Asociación entre la Arquitectura Muscular y el Índice de Calidad Muscular en Adultos Sedentarios / Association Between Muscle Architecture and Muscle Quality Index in Sedentary Adults

La evaluación de la calidad y la arquitectura muscular son importantes para comprender y cuantificar los cambios musculares asociados con el envejecimiento y el estilo de vida sedentario, además nos facilita información de la capacidad del músculo para generar fuerza, potencia o funcionalidad. los objetivos del estudio fueron (I) determinar la asociación entre los parámetros de la arquitectura muscular y el índice de calidad muscular (MQI) y (II) determinar la asociación entre los parámetros de la arquitectura muscular y la potencia media relativa del sit to stand test (STS). Únicamente el grosor muscular (MT) mostró una asociación moderada con el MQI (r = 0,545). En contraste, tanto la longitud del fascículo (FL) como el ángulo de penación (PA) exhibieron asociaciones "muy bajas", las cuales no resultaron significativas con el MQI. Al examinar la relación de los parámetros de la arquitectura muscular con la potencia media relativa de STS, MT presentó una asociación "moderada" (r = 0,444). Sin embargo, tanto FL como PA mostraron asociaciones "muy bajas" y "bajas", respectivamente, con la potencia media relativa al STS. En conclusión, estos hallazgos refuerzan la idea de que MT puede ser un indicador relevante de la calidad muscular y la capacidad de generar potencia en la prueba de STS. Específicamente, se observó que un aumento en MT estaba asociado con una mejora en MQI y la potencia media relativa de STS.

SUMMARY: Assessment of muscle quality and architecture is important for understanding and quantifying muscle changes associated with aging and a sedentary lifestyle and provides information on the muscle's ability to generate strength, power, or function. The aims of the study were (I) to determine the association between muscle architecture parameters and muscle quality index (MQI) and (II) to determine the association between muscle architecture parameters and mean relative power in the sit-to-stand test (STS). Only muscle thickness (MT) showed a moderate association with MQI (r = 0.545). In contrast, both fascicle length (FL) and penile angle (PA) exhibited "very low" associations, which were not significant with the MQI. When examining the relationship between muscle architecture parameters and mean relative STS power, MT presented a "moderate" association (r = 0.444). However, both LF and PA showed "very low" and "low" associations, respectively, with a mean power relative to STS. In conclusion, these findings reinforce the idea that MT may be a relevant indicator of muscle quality and ability to generate power in the STS test. Specifically, an increase in MT was associated with an improvement in MQI and mean power relative to STS.

Tracking de 10 anos da aptidão física e capacidade funcional de mulheres adultas praticantes de atividade física / 10-Year tracking of fitness and functional capacity of adult women practicing physical activity of physical activity

Contexto e objetivo: Diversos benefícios são advindos da prática da atividade física durante o envelhecimento, porém poucos são os achados que apresentem os dados ao longo do tempo. Assim, o objetivo deste estudo foi verificar a estabilidade das variáveis da aptidão física e capacidade funcional de mulheres adultas praticantes de atividade física em um período de 10 anos. Desenho e local: Estudo longitudinal com mulheres de São Caetano do Sul. Métodos: A amostra foi composta por 157 mulheres com idade entre 45 e 86 anos (65,7 ± 6,7), analisadas em quatro intervalos de tempo: baseline, 6, 8 e 10 anos, todas praticantes de atividade física. A avaliação incluiu variáveis antropométricas, neuromotoras e de capacidade funcional. A análise estatística utilizada foi o teste t de Student, correlação de Spearman Rho e delta percentual. O nível de significância adotado foi de P < 0,01. Resultados: Os resultados apresentaram correlações de estabilidade alta e significante (rho = 0,64 a 0,87) nos três grupos nas variáveis índice de massa corporal, adiposidade, força de membros superiores, flexibilidade e agilidade. O acompanhamento de 6 a 10 anos evidenciou diferenças significantes de força de membros superiores, inferiores, agilidade e equilíbrio, sendo expressa pela redução da força de membros superiores de 8% a 13%, força de membros inferiores de 18% a 21%, agilidade de 18% a 19% e equilíbrio de 28% a 34%. Conclusão: Houve estabilidade das variáveis antropométricas, neuromotoras, capacidade funcional e equilíbrio de mulheres adultas praticantes de atividade física, mesmo apresentando redução significativa nas variáveis citadas anteriormente.

Atletas de Taekwondo apresentam desequilíbrio muscular entre os músculos flexores e extensores do joelho: achados preliminares / Taekwondo athletes have muscle imbalance between knee flexors and extensions: preliminary findings / Los atletas de Taekwondo presentan un desequilibrio muscular entre los flexores y los extensores de la rodilla: hallazgos preliminares

Durante a prática de taekwondo com movimentos repetitivos, sistematizados e com certa sobrecarga de treino, o indivíduo pode gerar possíveis adaptações orgânicas que resultam em problemas posturais com grandes chances de desencadear desequilíbrio muscular. Objetivo: Verificar a presença de desequilíbrio entre os grupos musculares agonistas e antagonistas da articulação do joelho e entre membros dominantes e não dominantes de praticantes de taekwondo por meio da dinamometria isocinética. Método: Estudo transversal, observacional e descritivo realizado com nove praticantes de taekwondo do sexo masculino. Utilizou-se um dinamômetro isocinético para investigar o pico de torque, pico de torque por peso corporal, trabalho total, potência média, relação agonista/antagonista e índice de fadiga. Os dados dos membros dominante e não dominante foram comparados por meio do teste t-student para amostras pareadas. Foram calculados o intervalo de confiança de 95% da diferença média, o tamanho de efeito e o poder das análises. Resultados: Os músculos extensores dos membros dominante e não dominante apresentaram diferença média significante de 15,49 Nm (IC95% 7,27; 23,70; p=0,002) para pico de torque e de 22,64% (IC95% 11,83; 33,46; p=0,001) para pico de torque por peso corporal a 60°/s, representando tamanho de efeito médio. Conclusão: Os atletas de taekwondo apresentaram maior pico de torque e maior pico de torque por peso corporal dos músculos extensores do joelho a 60º/s no lado dominante. A relação agonista/ antagonista foi inferior a 60% e mais da metade dos atletas apresentaram uma diferença maior que 10% no pico de torque flexor no lado não dominante.

During taekwondo practice with the repetitive motions, systematized and with certain training overload, the person can generate possible organic adaptations that result in postural problems with a great chances of triggering muscle imbalance. Objective: To verify the presence of imbalance between agonist and antagonist muscle groups of knee joint and between dominant and non-dominant limbs through isokinetic dynamometry. Methods: Cross-sectional, observational and descriptive study realized with nine male taekwondo practitioners. An isokinetic dynamometer was used to investigate the peak torque, peak torque by body weight, total work, average power, agonist/antagonist ratio and fatigue index. Data from the dominant and non-dominant limbs were compared by t-student test for pared samples. The 95% confidence interval of the mean difference, the effect size and the power of analyses power were calculated. Results: The extensor muscles of the dominant and non-dominant limbs showed mean difference of 15,49 Nm (IC95% 7,27; 23,70; p=0,002) for peak torque and of 22,64% (IC95% 11,83; 33,46; p=0,001) for peak torque by body weight at 60°/s, representing average effect size. Conclusion: The taekwondo athletes had higher peak torque and higher peak torque by body weight of the knee extensors muscles in the dominant side. The agonist/ antagonist ratio was less than 60% and more than half of the athletes showed a difference greater than 10% in the peak flexor torque on the non-dominant side.

Durante la práctica de taekwondo con los movimientos repetitivos, sistematizados y con cierta sobrecarga de entrenamiento, la persona puede generar posibles adaptaciones orgánicas que deriven en problemas posturales con grandes posibilidades de desencadenar desequilibrios musculares. Objetivo: Verificar la presencia de desequilibrio entre grupos musculares agonistas y antagonistas de la articulación de la rodilla y entre miembros dominantes y no dominantes mediante dinamometría isocinética. Métodos: Estudio transversal, observacional y descriptivo realizado con nueve practicantes masculinos de taekwondo. Se utilizó un dinamómetro isocinético para investigar el par máximo, el par máximo por peso corporal, el trabajo total, la potencia media, la relación agonista/antagonista y el índice de fatiga. Los datos de las extremidades dominantes y no dominantes se compararon mediante la prueba t- student para muestras de pared. Se calcularon el intervalo de confianza del 95% de la diferencia media, el tamaño del efecto y la potencia de los análisis. Resultados: Los músculos extensores de los miembros dominantes y no dominantes mostraron una diferencia media de 15,49 Nm (IC95% 7,27; 23,70; p=0,002) para el par máximo y de 22,64% (IC95% 11,83; 33,46; p=0,001) para el par máximo por peso corporal a 60°/s, lo que representa el tamaño medio del efecto. Conclusiones: Los atletas de taekwondo presentaron un mayor par máximo y un mayor par máximo por peso corporal de los músculos extensores de la rodilla en el lado dominante. La relación agonista/antagonista fue inferior al 60% y más de la mitad de los atletas mostraron una diferencia superior al 10% en el pico de par flexor en el lado no dominante.

Investigation and influencing factors on pelvic floor muscle strength of 929 adult females in gynecological outpatient department / 中华妇产科杂志

Objective: To investigate the present situation of pelvic floor muscle strength, and to analyze the factors affecting pelvic floor muscle strength. Methods: The data of patients who were admitted into the general outpatient department of gynecology, Peking University People's Hospital from October 2021 to April 2022 were collected, and the patients who met the exclusion criteria were included in this cross sectional study. The patient's age, height, weight, education level, defecation way and defecation time, birth history, maximum newborn birth weight, occupational physical activity, sedentary time, menopause, family history and disease history were recorded by questionnaire. Morphological indexes such as waist circumference, abdomen circumference and hip circumference were measured with tape measure. Handgrip strength level was measured with grip strength instrument. After performing routine gynecological examinations, the pelvic floor muscle strength was evaluated by palpation with modified Oxford grading scale (MOS). MOS grade>3 was taken as normal group and ≤3 as decreased group. Binary logistic regression was used to investigate the related factors of deceased pelvic floor muscle strength. Results: A total of 929 patients were included in the study, and the average MOS grade was 2.8±1.2. By univariate analysis, birth history, menopausal time, defecation time, handgrip strength level, waist circumference and abdominal circumference were related to the decrease of pelvic floor muscle strength (all P<0.05). By binary logistic regression analysis, the level of handgrip strength (OR=0.913, 95%CI: 0.883-0.945; P<0.001) was correlated with normal pelvic floor muscle strength; waist circumference (OR=1.025, 95%CI: 1.005-1.046; P=0.016), birth history (OR=2.224, 95%CI: 1.570-3.149; P<0.001), sedentary time> 8 hours (OR=2.073, 95%CI: 1.198-3.587; P=0.009) were associated with the decrease of pelvic floor muscle strength. Conclusions: The level of handgrip strength is related to the normal pelvic floor muscle strength of females, while the waist circumference, birth history and sedentary time>8 hours are related to the decrease of pelvic floor muscle strength of females. In order to prevent the decrease of pelvic floor muscle strength, it is necessary to carry out relevant health education, enhance exercise, improve the overall strength level, reduce daily sedentary time, maintain symmetry, and carry out comprehensive overall intervention to improve pelvic floor muscle function.

Research progress of lower limb muscle strength training in the treatment of lliotibial band syndrome / 中国骨伤

Iliotibial band syndrome (ITBS), as an overused injury of the lower extremities, has developed into a common cause of lateral knee pain. At present, the treatment of ITBS includes drug therapy, muscle strength training, physical therapy, and surgical treatment. Among these methods, physical therapy, drug therapy, and surgical treatment can only alleviate the symptoms of patients. As a safe and effective treatment, lower limb muscle strength training can improve patients' muscle strength, correct abnormal gait, and reduce the recurrence rate of the disease by paying attention to the dynamic changes of patients' recovery process. At present, the pathogenesis of ITBS remains unclear, and the treatment methods are not unified. It is necessary to further study the biomechanical factors related to the lower extremities and develop more scientific and comprehensive muscle strength training methods.

Comparison of Effects of Liuzijue Exercise and Conventional Respiratory Training on Patients after Cardiac Surgery: A Randomized Controlled Trial / 中国结合医学杂志

OBJECTIVE@#To evaluate the feasibility and safety of Liuzijue exercise (LE) for the clinical effect in patients after cardiac surgery.@*METHODS@#Totally 120 patients who underwent cardiac surgery and were admitted to the Cardiothoracic Intensive Care Unit of Nanjing Drum Tower Hospital between July and Oclober, 2022 were allocated to the LE group, the conventional respiratory training (CRT) group, and the control group by a random number table at a ratio of 1:1:1; 40 patients in each group. All patients received routine treatment and cardiac rehabilitation. LE group and CRT group respectively performed LE and CRT once a day for 30 min for 7 days. Control group did not receive specialized respiratory training. The forced vital capacity, forced expiratory volume in 1 s, peak inspiratory flow rate, peak expiratory flow rate, maximum inspiratory pressure, maximum expiratory pressure, modified Barthel index (MBI), and Hamilton Rating Scale for Anxiety (HAM-A) were evaluated before, after 3 and 7 days of intervention. In addition, the postoperative length of hospital stay (LOS) and the adverse events that occurred during the intervention period were compared.@*RESULTS@#A total of 107 patients completed the study, 120 patients were included in the analysis. After 3 days of intervention, the pulmonary function, respiratory muscle strength, MBI and HAM-A of all 3 groups improved compared with that before the intervention (P<0.05 or P<0.01). Compared with the control group, pulmonary function and respiratory muscle strength were significantly improved in the CRT and LE groups (P<0.05 or P<0.01). MBI and HAM-A were significantly improved in the LE group compared with the control and CRT groups (P<0.05 or P<0.01). On the 7th day after intervention, the difference was still statistically significant (P<0.01), and was significantly different from that on the 3rd day (P<0.05 or P<0.01). In addition, on the 7th day of intervention, the pulmonary function and respiratory muscle strength in the LE group were significantly improved compared with those in the CRT group (P<0.01). MBI and HAM-A were significantly improved in the CRT group compared with the control group (P<0.01). There were no significant differences in postoperative LOS among the 3 groups (P>0.05). No training-related adverse events occurred during the intervention period.@*CONCLUSIONS@#LE is safe and feasible for improving pulmonary function, respiratory muscle strength, the ability to complete activities of daily living and for relieving anxiety of patients after cardiac surgery (Registration No. ChiCTR2200062964).

Influence of physical training on the physical quality of university students / Influência do treinamento físico sobre a qualidade física dos estudantes universitários / Influencia del entrenamiento físico en la calidad física de los estudiantes universitarios

ABSTRACT Introduction Although the overall physical health of university students has positive rates in recent years, indicators such as body composition, vital capacity, and flexibility have declined, following the indicators of speed and strength. Several studies corroborate the beneficial impacts of strength training, accelerating the metabolism of university students, reducing injuries and joint pain, and increasing flexibility, bone density, and self-image of obese students. In light of this situation, the government, through schools and related departments, encourage effective measures to control the current situation under a new context. Objective Study the impacts of strength training on the physical fitness of college students. Methods 70 male college students in a physical education institute were randomly divided into an experimental group and a control group, with 35 people in each group. Systematically protocoled and scientifically validated physical exercises were performed for eight weeks. After the implementation of physical exercise, physical quality indicators were evaluated. Results Functional physical training raised the scores of several sports of male college students. There was also an effective reduction in blood pressure in obese youth, improvement in vascular elasticity index, vital capacity, cardiovascular system function, exercise capacity, and strengthening physique. The results of the seven FMS tests were significantly improved. Physical function training can significantly improve and strengthen students' core, hip, shoulder, knee, and ankle stability and flexibility. Conclusion Strength training has been shown to improve college students' physical health indices. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

RESUMO Introdução Embora a saúde física geral dos estudantes universitários tenha índices positivos nos últimos anos, indicadores como a composição corporal, a capacidade vital e a flexibilidade tiveram um declínio, acompanhando os indicadores de velocidade e força. Vários estudos corroboram sobre os impactos benéficos do treinamento de força, acelerando o metabolismo dos estudantes universitários, reduzindo lesões e dores articulares, aumentando a flexibilidade, densidade óssea e a autoimagem dos estudantes obesos. Diante dessa situação, o governo, por intermédio das escolas e departamentos correlacionados incentiva medidas eficazes para controlar a situação atual sob um novo contexto. Objetivo Estudar os impactos do treino de força sobre a aptidão física dos estudantes universitários. Métodos 70 estudantes universitários do sexo masculino em um instituto de educação física foram divididos aleatoriamente em grupo experimental e grupo controle, com 35 pessoas em cada grupo. Exercícios físicos sistematicamente protocolados e cientificamente validados foram executados por oito semanas. Após a implementação do exercício físico, avaliou-se os indicadores de qualidade física. Resultados O treinamento físico funcional elevou as pontuações de vários esportes de estudantes universitários do sexo masculino. Também houve redução efetiva na pressão arterial de jovens obesos, melhora do índice de elasticidade vascular, capacidade vital, função do sistema cardiovascular, capacidade de exercício e alcançar o propósito de fortalecer o físico. Os resultados dos sete testes de FMS foram significativamente aprimorados. O treinamento em funções físicas pode melhorar e fortalecer significativamente a estabilidade do core dos alunos, estabilidade e flexibilidade do quadril, ombro, joelho e tornozelo. Conclusão O treinamento de força demonstrou-se eficaz em melhorar os índices de saúde física nos estudantes universitários. Nível de evidência II; Estudos terapêuticos - investigação dos resultados do tratamento.

RESUMEN Introducción Aunque la salud física general de los estudiantes universitarios presente índices positivos en los últimos años, indicadores como la composición corporal, la capacidad vital y la flexibilidad tuvieron un descenso, acompañando a los indicadores de velocidad y fuerza. Varios estudios corroboran los efectos beneficiosos del entrenamiento de fuerza, acelerando el metabolismo de los estudiantes universitarios, reduciendo las lesiones y el dolor articular, aumentando la flexibilidad, la densidad ósea y la autoimagen de los estudiantes obesos. Ante esta situación, el gobierno, a través de las escuelas y los departamentos relacionados, impulsa medidas eficaces para controlar la situación actual en un nuevo contexto. Objetivo Estudiar el impacto del entrenamiento de fuerza en la condición física de los estudiantes universitarios. Métodos 70 estudiantes universitarios varones de un instituto de educación física fueron divididos aleatoriamente en grupo experimental y grupo de control, con 35 personas en cada grupo. Se realizaron ejercicios físicos sistemáticamente protocolizados y científicamente validados durante ocho semanas. Tras la realización del ejercicio físico, se evaluaron los indicadores de calidad física. Resultados El entrenamiento físico funcional aumentó las puntuaciones de varios deportes de los estudiantes universitarios masculinos. También hubo una reducción efectiva de la presión arterial de los jóvenes obesos, la mejora del índice de elasticidad vascular, la capacidad vital, la función del sistema cardiovascular, la capacidad de ejercicio y lograr el propósito de fortalecer el físico. Los resultados de las siete pruebas FMS mejoraron significativamente. El entrenamiento de la función física puede mejorar y fortalecer significativamente la estabilidad del core, la cadera, el hombro, la rodilla y el tobillo de los estudiantes y la flexibilidad. Conclusión El entrenamiento de fuerza ha demostrado ser eficaz para mejorar los índices de salud física de los estudiantes universitarios. Nivel de evidencia II; Estudios terapéuticos - investigación de los resultados del tratamiento.

Asociación entre variables de empuje Isométrico de media pierna (EIMP) con variables antropométricas y cualidades físicas en jugadores varones de Rugby Amateurs / Relationships between Isometric Mid-Thigh pull with anthropometric variables and physical qualities in Amateur Rugby players / Relações entre a puxada isométrica do meio da coxa com variáveis antropométricas e qualidades físicas em jogadores amadores de rugby

Objetivo: el objetivo de este estudio es describir el perfil de las variables del EIMP entre las dos posiciones de juego y determinar las posibles asociaciones con las características antropométricas y las cualidades físicas de un grupo de jugadores Rugby amateurs chilenos. Hipótesis: es por eso por lo que podemos plantear como hipótesis la existencia de asociaciones entre las variables de EIMP y las cualidades físicas de los jugadores de RU. Diseño metodológico: este estudio tiene un diseño de cohorte observacional, descriptivo y correlacional. Se investigó la asociación existente entre las variables de EIMP con las pruebas físicas y las variables antropométricas. Fueron evaluados treinta y dos jugadores de rugby varones de nivel amateurs chilenos (promedio ( DE, edad, 23,3 ( 5,4 años). Resultados: para la variable Masa Muscular se encontraron asociaciones grandes (r = 0.53) (p = 0.001) con la FM y asociaciones moderadas (r = 0,48) (r = 0,47) (r = 0,44) (r = 0,46) con F50, F100, F150 y F200 respectivamente. También se pueden observar las asociaciones grandes (R2 = 0,305) (R2 = 0,297) (R2 = 0,267) entre 1RM PB y F200, F100 y F150, respectivamente. Conclusión: en conclusión, este estudio puede demostrar la existencia de asociaciones estadísticamente significativas entre algunas de las variables antropométricas y físicos con las variables de Fuerza de EIMP en jugadores de RU amateurs chilenos.

OBJECTIVE: The objective of this study is to describe the profile of the EIMP variables between two playing positions and to determine its possible associations with anthropometric characteristics and physical qualities of a group of Chilean amateur rugby players. HYPOTHESIS: There are associations between the EIMP variables and the physical qualities of UR players. METHODOLOGICAL DESIGN: This study has an observational, descriptive and correlational cohort design. The association between the EIMP variables, from the physical tests, and the anthropometric variables was investigated. Thirty-two Chilean amateur-level male rugby players were evaluated (mean ( SD, age, 23.3 ( 5.4 years). RESULTS: For the Muscle Mass variable, large associations were found (r=0.53) (p=0.001) to FM, and moderate associations (r=0.48) (r=0.47) (r=0.44) (r =0.46) to F50, F100, F150, and F200 respectively. Large associations (R2=0.305) (R2=0.297) (R2=0.267) between 1RM PB and F200, F100, and F150, respectively, can also be observed. CONCLUSION: In conclusion, this study can demonstrate the existence of statistically significant associations between some of the anthropometric and physical variables and the EIMP Strength variables in Chilean amateur UR players.

OBJETIVO: O objetivo deste estudo é descrever o perfil das variáveis EIMP entre as duas posições de jogo e determinar as possíveis associações com as características antropométricas e qualidades físicas de um grupo de jogadores amadores de rugby chilenos. HIPÓTESE: É por isso que podemos hipotetizar a existência de associações entre as variáveis do EIMP e as qualidades físicas dos jogadores do RU. DESENHO METODOLÓGICO: Este estudo tem um desenho de coorte observacional, descritivo e correlacional. Investigou-se a associação entre as variáveis do EIMP com os testes físicos e as variáveis antropométricas. Trinta e dois jogadores de rugby masculinos de nível amador chileno foram avaliados (média ( DP, idade, 23,3 ( 5,4 anos). RESULTADOS: Para a variável Massa Muscular foram encontradas grandes associações (r=0,53ejercicio y cualidades físicos) (r=0,47) (r=0,44) (r=0,46) com F50, F100, F150 e F200 respectivamente. Grandes associações (R2=0,305) (R2=0,297) (R2=0,267) entre 1RM PB e F200, F100 e F150 respebaloncestotambém podem ser observadas. CONCLUSÃO: Em conclusão, este estudo pode demonstrar a existência de associações estatisticamente significativas entre algumas das variáveis antropométricas e físicas com as variáveis EIMP Força em jogadores amadores do RU chilenos.

Isometric resistance training effects on lower limb muscle activity / Efeitos do treino isométrico resistido sobre a atividade muscular dos membros inferiores / Efectos del entrenamiento de resistencia isométrica en la actividad muscular de los miembros inferiores

ABSTRACT Introduction The high muscular strength in the hip joint is the foundation of jumping ability. Isometric resistance training includes the process of takeoff and landing, recruiting a more extensive set of muscle groups. Objective Analyze the isometric resistance training effects on lower limb muscle activity, including the coactivation of the antagonist's muscles. Methods By mathematical statistics, weight-bearing isometric resistance training effects on lower extremity maximal muscle strength and explosive power were observed. Changes in coactivation and preactivation levels of lower extremity antagonist muscles data are evaluated and compared before and after isometric resistance training. Results The peak angular velocity of the joints at the hip and ankle in the isometric resistance training group is significantly higher than the control group. There was no significant difference in the peak angular velocity of the knee between the groups (P<0.05). Conclusion Isometric resistance training can shorten the return period, shorten the amortization period, and increase the energy conversion capacity in the muscle-tendon complex. Evidence level II; Therapeutic Studies - Investigating the results.

RESUMO Introdução A elevada força muscular na articulação do quadril é o que fundamenta a habilidade do salto. O treino resistido isométrico inclui o processo de decolagem e aterrissagem, recrutando um conjunto maior de grupos musculares. Objetivo Analisar os efeitos do treino isométrico resistido sobre a atividade muscular dos membros inferiores, incluindo a coativação dos músculos antagonistas. Métodos Por meio de estatísticas matemáticas, observa-se o efeito do treino isométrico resistido com sustentação de peso na força muscular máxima das extremidades inferiores e sua potência explosiva. Os dados das mudanças nos níveis de coativação e pré-ativação dos músculos antagonistas dos membros inferiores são avaliados e comparados antes e após o treino isométrico resistido. Resultados O pico de velocidade angular das articulações no quadril e tornozelo do grupo de treino isométrico resistido é significativamente maior do que no grupo controle. Não houve diferença significativa no pico de velocidade angular do joelho entre os dois grupos (P<0,05). Conclusão O treino isométrico resistido pode encurtar o período de retorno, encurtar o período de amortização e aumentar a capacidade de conversão de energia no complexo músculo-tendíneo. Nível de evidência II; Estudos terapêuticos - Investigação de resultados.

RESUMEN Introducción La elevada fuerza muscular en la articulación de la cadera es lo que fundamenta la capacidad de saltar. El entrenamiento de resistencia isométrica incluye el proceso de despegue y aterrizaje, reclutando un conjunto mayor de grupos musculares. Objetivo Analizar los efectos del entrenamiento de resistencia isométrica en la actividad muscular de las extremidades inferiores, incluyendo la coactivación de los músculos antagonistas. Métodos Mediante la estadística matemática, se observó el efecto del entrenamiento de resistencia isométrica con carga de peso sobre la fuerza muscular máxima de las extremidades inferiores y su potencia explosiva. Los datos de los cambios en los niveles de coactivación y preactivación de los músculos antagonistas de las extremidades inferiores se evalúan y comparan antes y después del entrenamiento de resistencia isométrica. Resultados La velocidad angular máxima de las articulaciones en la cadera y el tobillo en el grupo de entrenamiento de resistencia isométrica es significativamente mayor que en el grupo de control. No hubo diferencias significativas en la velocidad angular máxima de la rodilla entre los dos grupos (P<0,05). Conclusión El entrenamiento de resistencia isométrica puede acortar el periodo de retorno, reducir el periodo de amortización y aumentar la capacidad de conversión de energía en el complejo músculo-tendón. Nivel de evidencia II; Estudios terapéuticos - Investigación de resultados.

Rendimiento de atletas de levantamiento de potencia (Powerlifting) durante su vida / The Performance of Powerlifting Athletes During Their Lifetime

Resumen Esta investigación realizó una minería de datos de hombres y mujeres atletas de levantamiento de potencia (comúnmente conocido como powerlifting), para las clases: Levantamiento de potencia equipado, Levantamiento de potencia clásico, Press de banca equipado y Press de banca clásico, reconocidas por la Federación Internacional de Powerlifting (IPF). Se realizó un análisis de regresión no lineal basado en la edad versus la media de los puntajes: Wilks Points, IPF Points o IPF GoodLift Points. Se obtuvo la curva mejor ajustada y la edad con el máximo rendimiento para cada clase. En general, el rendimiento para todas las clases de hombres y mujeres en Levantamiento de potencia y Press de banca comienza con un crecimiento exponencial desde la juventud hasta cerca de la tercera década, y muestra un rendimiento máximo entre 27,67 a 31,50 años, y luego una disminución lineal durante la edad madura y edad avanzada. La comparación entre hombres y mujeres, o grupos de atletas equipados y clásicos no muestra diferencias significativas para la edad del rendimiento máximo, lo que sugiere el mismo reloj de envejecimiento biológico. El deporte de levantamiento de potencia es un modelo útil para estudiar el crecimiento, la maduración y el envejecimiento del ser humano.

Abstract This research performed data mining for men and women powerlifters for the categories of Equipped Powerlifting, Classic Powerlifting, Equipped Bench Press, and Classic Bench Press, recognized by the International Powerlifting Federation (IPF). It then conducted a nonlinear regression analysis based on age versus mean scores in terms of Wilks Points, IPF Points, and IPF GoodLift Points to obtain the fitted curve and the age of peak performance for each category. Overall, the performance for all categories of men and women in powerlifting and bench press starts with exponential growth from youth until close to the third decade, showing a peak performance between 27.67 to 31.50 years of age, and then a linear decrease during maturation and older age. Comparisons between men and women and between equipped and classic athletes do not show meaningful differences in age of peak performance, suggesting the same biological clock in terms of aging. The sport of powerlifting offers a useful model to study human beings' growth, maturation, and aging.

Resumo Esta pesquisa realizou uma garimpagem de dados de atletas masculinos e femininos do levantamento de peso (comumente conhecido como powerlifting), para as classes: levantamento de peso equipado, levantamento de peso clássico, Press de banco equipado e Press de banco clássico, reconhecidos pela Federação Internacional de Powerlifting (IPF). Uma análise de regressão não linear foi realizada com base na idade versus pontuação média: Wilks Points, IPF Points ou IPF GoodLift Points. Foi obtida a melhor curva ajustada e idade com o melhor desempenho para cada classe. Em geral, o desempenho para todas as classes de homens e mulheres em levantamento de potência e Press de banco começa com um crescimento exponencial da juventude até próximo a terceira década, mostrando um desempenho máximo entre 27,67 a 31,50 anos, e depois uma diminuição linear durante a idade madura e a idade avançada. A comparação entre homens e mulheres, ou atletas equipados e clássicos, não mostra diferenças significativas para a idade do melhor desempenho, sugerindo o mesmo relógio do envelhecimento biológico. O esporte de levantamento de peso é um modelo útil para estudar o crescimento, a maturação e o envelhecimento humano.

Impacto de un programa de actividad física musicalizada sobre la aptitud física de ancianas / Impact of musicalized physical activity program on the physical fitness of elderly women

Introducción: El envejecimiento es un proceso natural consecuencia de múltiples factores moleculares y celulares que producen un deterioro de la aptitud física. Objetivo: Determinar el impacto de un programa de actividad física musicalizada en la aptitud física de ancianas colombianas. Métodos: Estudio cuasiexperimental realizado en 49 ancianas de Bucaramanga, Colombia. Se implementó un programa de actividad física musicalizada de 10 semanas. La composición corporal, la capacidad aeróbica y la fuerza de miembros inferiores se determinaron mediante el Índice de Masa Corporal, las pruebas de seis minutos de caminata, y sentarse y levantarse de una silla, respectivamente. Las variables fueron analizadas en medidas de tendencia central o frecuencias según su naturaleza. Para determinar la existencia de una diferencia estadísticamente significativa, se usaron las pruebas t-student y exacta de Fischer. El nivel de significancia fue de p≤0,05. Resultados: Luego de la implementación del programa, se evidenció una disminución de 0,71 kg/m2 en la media de IMC, un aumento de 2,14 en la media de repeticiones en la prueba de resistencia a la fuerza y un incremento de 39,89 en la media de metros alcanzados en la prueba de capacidad aeróbica. Así mismo, aumentó el número de mujeres que pasaron a la categoría funcional en los niveles de fuerza y capacidad aeróbica y el número de mujeres que alcanzaron un peso normal. Las diferencias anteriormente mencionadas fueron estadísticamente significativas. Conclusiones: El programa de actividad física musicalizada mejoró la composición corporal y aumentó los niveles de fuerza muscular y capacidad aeróbica(AU)

Introduction: Aging is a natural process resulting from multiple molecular and cellular factors producing deterioration of physical fitness. Objective: To determine the impact of a musicalized physical activity program on the physical fitness of elderly Colombian women. Methods: A quasi-experimental study carried out in 49 elderly women from Bucaramanga, Colombia. We implemented a 10-week musicalized physical activity program. Body composition, aerobic capacity, and lower limb strength were determined by Body Mass Index, six-minute walk, and chair sitting and standing tests, respectively. The variables were analyzed in measures of central tendency or frequencies according to their nature. To determine the existence of a statistically significant difference, the t-student and Fischer's exact tests were used. The level of significance was p ≤ 0.05. Results: After implementing the program, the mean BMI decreased by 0.71 kg/m2, the mean number of repetitions increased by 2.14 in the strength resistance test and the average reached meters increased by 39 .89 in the aerobic capacity test. Likewise, the number of women who moved into the functional category in strength and aerobic capacity levels and the number of women who reached a normal weight increased. The aforementioned differences were statistically significant. Conclusions: The musicalized physical activity program improved body composition and increased levels of muscle strength and aerobic capacity(AU)

Adaptation to university studies affects on functional state of freshmen

According to different researches, 30% of university graduates have a low level of health, and studying at university is one of the factors of its deterioration, besides the first year is considered critical. The purpose of research is to study the dynamics of physical development, physical fitness and functional state of young men during the first year of university studies. For the survey we used standard measurements and index calculations for 11 indicators of physical development, 9 indicators of physical fitness and 15 indicators of functional status. We calculated the arithmetic mean (M), the standard error of the mean (m), then evaluated differences by the Student criterion (t) for independent samples and considered them as reliable atр < 0.05. It is shown that during the first year of studies, young men have an increase in the Erismann index, the corpulence (Rohrer's) index, the body mass index and a decrease in the Pignet index. There is also an increase in the coefficient of endurance, adaptive capacity and diastolic pressure, while vital capacity of the lungs, the vital index, time of hanging on the bar and the speed of running 1000 m decrease. The dynamics of physical development is expressed in a change in mass-growth indices and indicates an increase in body weight. The dynamics of physical fitness is expressed in a decrease of the time of hanging on the bar and the speed of running 1000 m. The dynamics of the functional state is expressed in a decrease of vital capacity of the lungs, vital index, increase in the coefficient of endurance, adaptive capacity and diastolic blood pressure.

Correlation analysis of cervical spine dysfunction, pain and muscle strength in office workers / 中华劳动卫生职业病杂志

Objective: To expore the correlation between neck disability, neck pain and muscle strength in cervical pondylosis of office worker, and to provide scientific basis for the prevention and treatment of cervical spondylosis. Methods: In April 2021 ,234 patients with cervical spondylotic myelopathy treated in the Subsidiary Rehabilitation Hospital of Fujian University of Traditional Chinese Medicine from April 2015 to April 2017 were selected, the correlation between Neck Disability Index (NDI) score, neck pain and muscle strength was analyzed using the Spearman rank correlation method. Mann-Whitney U test was used to compare the difference of maximum muscle strength of isometric contraction. Results: NDI score was negatively correlated with neck flexion, extension, and muscle strength in the left and right flexion directions (r(s)=-0.164, -0.169, -0.222, -0.176, P=0.012, 0.010, 0.001 , 0.007). In mild and moderate functional disorder patients, the muscle strength in flexion, extension and left and right flexion direction was greater, the difference was statistically significant (P <0.01). Conclusion: There is a negative correlation between cervical functional disorder and cervical muscle strength in office workers, suggesting that strengthening cervical muscle strength may be a way to improve cervical spine function.

Efectos del autoinjerto hueso-tendón patelar-hueso sobre la posición articular y la fuerza en pacientes con reconstrucción del ligamento cruzado anterior / Effects of bone-patellar tendon-bone autograft on joint position and strength in patients with anterior cruciate ligament reconstruction

RESUMEN: El objetivo del estudio fue comparar el déficit propioceptivo a través del Joint position sense (JPS) y Force steadiness en pacientes con reconstrucción del ligamento cruzado anterior (LCA) injerto hueso-tendón patelar-hueso (HTH) 6 a 12 meses postcirugía. Participaron 15 pacientes (13 hombres y 2 mujeres, 25,5 ± 1,3 años) con reconstrucción de LCA con autoinjerto HTH y 20 personas sin lesión del LCA (19 hombres y 1 mujer, 24,1 ± 0,8 años). Para evaluar la sensación de posición de la articulación de la rodilla se midió la Joint position sense (JPS) en tres rangos: 0°-30°, 31°-60° y 61°-90° y la sensación de fuerza del cuádriceps fue evaluada con la prueba Force steadiness (FS) al 15 % de la contracción voluntaria máxima (CVM), ambas pruebas realizadas 6 a 12 meses post cirugía. Los resultados mostraron que no hubo diferencias estadísticamente significativas en la sensación de la posición articular (JPS 0°-30°) (p=0.564) y 31°-60° (p=0.681), mientras que en el rango 61°-90° (p=0.003) existieron diferencias estadísticamente significativas. En las mediciones de sensación de fuerza del cuádriceps (FS al 15 % CVM) entre los pacientes operados de LCA técnica HTH y el grupo control no hubo diferencias estadísticas (p= 0.987) La sensación de la fuerza del cuádriceps medida con la prueba FS al 15 % CVM no presentaría déficit entre los 6 a 12 meses en pacientes post operados de LCA al ser comparados con sujetos sin lesión ni cirugía de este ligamento. Se concluye que la sensación de la posición articular medida con la prueba JPS en en tres rangos articulares de pacientes con reconstrucción de LCA injerto HTH 6 a 12 meses post cirugía sólo mostró alteraciones en el rango de 61°- 90° al ser comparado con el grupo control, lo cual indica que la sensación de la posición articular presenta un déficit en este rango específico.

SUMMARY: The aim of the study was to compare the proprioceptive deficit through the Joint position sense (JPS) and Force steadiness in patients with anterior cruciate ligament (ACL) bone-patellar tendon-bone graft (PTH) reconstruction 6 to 12 months post-surgery. Fifteen patients (13 men and 2 women, 25.5 ± 1.3 years) with ACL reconstruction with HTH autograft and 20 persons without ACL injury (19 men and 1 woman, 24.1 ± 0.8 years) participated. To assess knee joint position sensation, Joint position sense (JPS) was measured in three ranges: 0°-30°, 31°- 60° and 61°-90° and quadriceps strength sensation was assessed with the Force steadiness (FS) test at 15 % of maximal voluntary contraction (MVC), both tests performed 6 to 12 months post surgery. The results showed that there were no statistically significant differences in joint position sensation (JPS 0°-30°) (p=0.564) and 31°-60° (p=0.681), while in the range 61°-90° (p=0.003) there were statistically significant differences. In the quadriceps strength sensation measurements (FS at 15 % CVM) between the patients operated on ACL HTH technique and the control group there were no statistical differences (p= 0.987). The quadriceps strength sensation measured with the FS test at 15 % CVM would not present a deficit between 6 to 12 months in post- operated ACL patients when compared to subjects without injury or surgery of this ligament. It is concluded that the joint position sensation measured with the JPS test in three joint ranges of patients with ACL reconstruction HTH graft 6 to 12 months post surgery only showed alterations in the range of 61°- 90° when compared to the control group, indicating that the joint position sensation presents a deficit in this specific range.

Actn3 gene polymorphism and factors associated with functional performance in elderly women assisted in primary health care / Polimorfismo do gene actn3 e os fatores associados ao desempenho funcional de idosas atendidas na atenção primária em saúde

ABSTRACT Objective: To analyze potential influences of the R/X genetic polymorphism of the ACTN3 gene, as well as of anthropometric and metabolic characteristics on the functional performance of elderly women assisted in primary health care. Method: One hundred and forty-one elderly women were assessed in terms of anthropometric, metabolic and functional aspects, in addition to clinical, cognitive and demographic characteristics. Allele and genotype frequencies of ACTN3 gene polymorphism were determined. Results: 141 elderly women (68.30 ± 6.18 years) were evaluated. No significant differences (p > 0.05) were observed between the RR and RX/XX genotypes in the elderly women's functional performance, anthropometric or metabolic characteristics. The TUG test completion time showed positive correlations with age, body mass index, waist circumference, and fat percentage (s = 0.315; p < 0.001; s = 0.238; p = 0.005; s = 0.174; p = 0.039; s = 0.207; p = 0.014), respectively. Negative correlations were found between the TUG test with absolute handgrip strength (s = - 0.314; p < 0.001) and relative handgrip strength (s = - 0.380; p < 0.001). Conclusion: In our study, there were no influences from ACTN3 gene polymorphisms on the functional performance of the elderly women, which is influenced by other factors.

RESUMO Objetivo: analisar as potenciais influências do polimorfismo genético R/X do gene ACTN3 e das características antropométricas e metabólicas no desempenho funcional de mulheres idosas atendidas na atenção primária em saúde. Método: Cento e quarenta e uma idosas foram avaliadas em relação as características antropométricas, metabólicas, funcionais, aspectos clínicos, cognitivos e demográficos. Foram determinadas as frequências de alelos e genótipos do polimorfismo do gene ACTN3. Resultados: 141 idosas (68,30 ± 6,18 anos) foram avaliadas. Não foram observadas diferenças significativas (p > 0,05) entre os genótipos RR e RX/XX no desempenho funcional, características antropométricas ou metabólicas das idosas. O tempo de realização do TUG apresentou correlações positivas com idade, índice de massa corporal, circunferência da cintura e percentual de gordura (s = 0,315; p < 0,001; s = 0,238; p = 0,005; s = 0,174; p = 0,039; s = 0,207; p = 0,014) respectivamente. Correlações negativas foram observadas entre o TUG com força de preensão manual absoluta (s = - 0,314; p < 0,001) e relativa (s = - 0,380; p < 0,001). Conclusão: Em nosso estudo, não foram observadas influências dos polimorfismos do gene ACTN3 no desempenho funcional das idosas, sendo este, influenciado por outros fatores.

Factors associated with dynapenia in older adults in the northeast of Brazil / Fatores associados à dinapenia em idosos do nordeste brasileiro

ABSTRACT This study identified factors associated with dynapenia in older adults residing in a small town in northeastern Brazil. It is a population-based study conducted with 208 senior citizens (58.7% women) from Aiquara, BA. Sociodemographic, behavioral and health information were obtained from face-to-face interviews, and nutritional status was assessed by body mass index. To measure their level of physical activity and sedentary behavior, the International Physical Activity Questionnaire was used. Dynapenia was diagnosed by sex, from the 25th percentile of handgrip strength, by means of a hydraulic dynamometer. For inferential analyses, Poisson regression was used, with a robust estimator, calculation of Prevalence Ratios (PRs) and their respective 95% Confidence Intervals (CIs). The prevalence of dynapenia was higher in older adults aged 70-79 (PR: 3.21; 95%CI: 1.55-6.64) and ≥80 years (PR: 4.91; 95%CI: 2.32-10.39), in those with low weight (PR: 2.20; 95%CI: 1.26-3.82), in those who are insufficiently active (PR: 1.99; 95%CI: 1.12-3.54), and among those with high level of sedentary behavior (PR: 1.88; 95%CI: 1.19-2.98). The factors identified as being associated with dynapenia were: age between 70 and 79 and ≥80 years, insufficient level of physical activity; high level of sedentary behavior, and low weight.

RESUMO Este estudo identificou os fatores associados à dinapenia em idosos residentes em um município de pequeno porte do Nordeste brasileiro. Trata-se de um estudo populacional, conduzido com 208 idosos (58,7% mulheres) de Aiquara-BA. As informações sociodemográficas, comportamentais e de condições de saúde foram obtidas em entrevistas face a face, e o estado nutricional foi avaliado pelo índice de massa corporal. Para mensuração do nível de atividade física e do comportamento sedentário, utilizou-se o International Physical Activity Questionnaire. O diagnóstico da dinapenia foi realizado por sexo, a partir do percentil 25 da força de preensão manual, averiguada com um dinamômetro hidráulico. Para análises inferenciais foi utilizada a regressão de Poisson, com estimador robusto, cálculo das Razões de Prevalência (RP) e de seus respectivos intervalos de confiança de 95% (IC). A prevalência de dinapenia foi maior nos idosos com idade entre 70-79 (RP: 3,21; IC95%: 1,55-6,64) e ≥80 anos (RP: 4,91; IC95%: 2,32-10,39), nos com baixo peso (RP: 2,20; IC95%: 1,26-3,82), nos insuficientemente ativos (RP: 1,99; IC95%: 1,12-3,54) e entre os com elevado comportamento sedentário (RP: 1,88; IC95%: 1,19-2,98). Identificou-se que os fatores associados à dinapenia foram: idade entre 70-79 e ≥80 anos, nível de atividade física insuficiente; elevado comportamento sedentário e baixo peso.

Efeitos dos exercícios vocais no tratamento da disfagia: revisão integrativa / Effects of vocal exercises on the treatment of dysphagia: integrative review

RESUMO Objetivo verificar as evidências disponíveis sobre o efeito dos exercícios vocais no tratamento da disfagia. Estratégia de pesquisa foi realizado levantamento bibliográfico nas bases de dados PubMed, LILACS, SciELO e MEDLINE, sem restrições quanto ao período de publicação. Critérios de seleção artigos originais, estudos de caso e/ou revisões de literatura publicados nos idiomas português e/ou inglês, disponíveis eletronicamente na íntegra e que abordassem o tratamento clínico com exercícios vocais em adultos e idosos com disfagia. Foram excluídas publicações repetidas nas bases de dados, com população de crianças, com indivíduos que não apresentassem o diagnóstico de disfagia, com exercícios vocais sem especificação, com exercícios exclusivos de deglutição, artigos e/ou resumos sem possibilidade de acesso pelas plataformas institucionais e estudos com modelo animal. Resultados foram encontrados 2.356 artigos, dos quais, após aplicados os critérios de elegibilidade, foram selecionados 8 para a amostra final. Para avaliar os efeitos dos exercícios vocais, os estudos utilizaram avaliação clínica, videofluoroscopia, videoendoscopia e eletromiografia. Quanto aos efeitos dos exercícios vocais na deglutição, observou-se que as técnicas de som plosivo, empuxo, trato vocal semiocluído, som basal, modulação vocal, sobrearticulação, o método Lee Silverman Voice Treatment® e o uso de exercícios de treino de força muscular expiratória apresentaram efeitos positivos na reabilitação da disfagia. Conclusão os estudos com treino de força muscular expiratória, o método Lee Silverman e os exercícios vocais tradicionais demonstraram efeitos positivos no tratamento da disfagia. No entanto, ainda não foi possível comprovar o nível de evidências de todos os estudos.

ABSTRACT Purpose To verify the available evidence on the effect of vocal exercises on the treatment of dysphagia. Research strategy A bibliographic survey was carried out in the PubMed, LILACS, SciELO and MEDLINE databases, with no restrictions on the publication period. Selection criteria Original articles, case studies and/or literature reviews published in Portuguese and/or English, available electronically in full and addressing clinical treatment with vocal exercises in adults and elderly with dysphagia. Publications repeated by the databases, with a population of children, individuals who did not present the diagnosis of dysphagia, with vocal exercises without specification, with exclusive swallowing exercises, articles and/or abstracts without the possibility of access by institutional platforms, and studies with animal model were excluded. Results A total of 2,356 articles were found, of which, after the eligibility criteria were applied, 08 were selected for the final sample. To evaluate the effects of vocal exercises, the studies used clinical evaluation, videofluoroscopy, videoendoscopy and electromyography. Regarding the effects of vocal exercises on swallowing, it was observed that the techniques of plosive sound, buoyancy, semi-occluded vocal tract, basal sound, vocal modulation, overarticulation, the Lee Silverman Voice Treatment method® and the use of expiratory muscle strength training exercises showed positive effects in the rehabilitation of dysphagia. Conclusion It was observed that studies with expiratory muscle strength training (EMST), Lee Silverman method (LSVT®) and traditional vocal exercises demonstrated positive effects in the treatment of dysphagia. However, it has not yet been possible to prove the level of evidence in all studies.

Analysis of postural control and muscle function performance of older adults participating in a multicomponent exercise program in primary health care / Análise do desempenho do controle postural e da função muscular de idosos participantes de um programa de exercício multicomponente na Atenção Primária à Saúde

Objectives: This cross-sectional study aimed to investigate (1) postural control performance in different postural tasks and (2) muscle strength and power of the hip, knee, and ankle of active vs inactive older adults. Methods: The sample consisted of 61 healthy community-dwelling older adults, classified into 2 groups: active, consisting of participants of a multicomponent exercise program offered through the Exercise Orientation Service; and inactive. Participants were considered physically active/inactive in the past 3 months. Postural control was assessed using a force plate in 8 postural tasks. Muscle function was evaluated using an isokinetic dynamometer. T-tests were used to compare clinical characteristics between the groups. ANCOVA and MANCOVA were used to compare differences in variables of postural control and muscle function. Results: Active participants had higher levels of physical activity, clinical balance, and quality of life than inactive participants. The active group had lower values for area (center of pressure) than the inactive group under the following conditions: bipedal stance on an unstable surface with eyes open and with eyes closed, and semi-tandem stance on an unstable surface with eyes open. The active group showed greater muscle power, with higher mean power values for hip abduction and adduction, knee extension, and knee flexion and shorter time to peak torque for hip adduction and ankle dorsiflexion than the inactive group. Conclusions: Multicomponent exercise programs delivered in primary health care settings contributed to improving postural control and muscle power in this sample of older adults, which can potentially help prevent falls and improve quality of life.

Objetivo: Este estudo transversal visou investigar: (1) o desempenho no controle postural em diferentes tarefas e (2) a força e a potência musculares de quadril, joelho e tornozelo de idosos ativos vs. inativos. Metodologia: A amostra foi composta de 61 idosos comunitários saudáveis, classificados em dois grupos: os ativos, participantes do programa de exercício multicomponente ofertado pelo Serviço de Orientação ao Exercício, e os inativos. Os participantes foram considerados fisicamente ativos/inativos nos três meses anteriores. O controle postural foi avaliado em oito tarefas usando-se uma plataforma de força. A função muscular foi mensurada com um dinamômetro isocinético. Foram utilizados testes t para comparar as características clínicas entre os grupos. Análise de covariância e análise multivariada de covariância foram utilizadas para comparar diferenças nas variáveis de controle postural e função muscular. Resultados: Os participantes ativos apresentaram maiores níveis de atividade física, equilíbrio e qualidade de vida que os inativos. O grupo ativo apresentou menores valores de área (centro de pressão) que o inativo nas seguintes condições: base bipodal em superfície instável com olhos abertos e fechados e base semitandem em superfície instável com olhos abertos. O grupo ativo apresentou maior potência que o inativo, com maior valor de potência média para abdução e adução de quadril, extensão e flexão de joelho, e menor tempo de pico de torque para adução de quadril e dorsiflexão de tornozelo. Conclusão: Programas de exercício multicomponente ofertados na Atenção Primária à Saúde contribuíram para melhorar o controle postural e a potência muscular nesta a

Efecto de la práctica mental kinestésica en la fuerza y actividad mioeléctrica del bíceps braquial, luego de un periodo de inmovilización de codo en adultos-jóvenes sanos / Effects of kinesthetic mental practice in strength and myoelectric activity of the brachialis biceps due to an elbow immobilization period in healthy young adults

RESUMEN: El objetivo de este estudio fue determinar el efecto de la práctica mental kinestésica (PMK) en la fuerza y actividad eléctrica muscular (AEM) del bíceps braquial, luego de un periodo de inmovilización del codo en un grupo de personas adultos jóvenes sanos. Un total de 14 personas (18,64 ± 0,92 años de edad) participaron voluntariamente del estudio, a las cuales se les evaluó la fuerza muscular de prensión y la AEM del bíceps braquial utilizando un dinamómetro de mano y un equipo de electromiografía, respectivamente, antes y después de un periodo de inmovilización del brazo no dominante, y se asignaron aleatoriamente a uno de dos grupos: grupo control (GC) o experimental (GE). El GE realizó PMK: tres series de 15 repeticiones con un minuto de descanso entre series, tres veces al día durante los seis días de inmovilización, mientras que el GC no realizó PKM durante su inmovilización. Al aplicar una prueba de ANOVA de dos vías, no se encontraron diferencias significativas en la fuerza ni en la AEM. Sin embargo, la fuerza del GC disminuyó en 23,75%, mientras que la del GE aumentó en 33,19%. Los resultados sugieren que un periodo de inmovilización del codo de seis días no fue suficiente para que la fuerza ni la AEM disminuyan significativamente, lo que supone que la PMK realizada no es necesaria en periodos menores a seis días.

ABSTRACT: The aim of this study was to determine the effect of kinesthetic mental practice (KMP) on the strength and muscular electrical activity (MEA) of the brachial biceps, after a period of immobilization of the elbow in a group of healthy young adults. A total of 14 volunteer participants (18.64 ± 0.92 years of age) were part in the study. The muscle strength and the AEM of the brachial biceps were assessed using a hand dynamometer and an electromyography equipment, respectively, before and after a period of immobilization of the non-dominant arm. After the pretest, they were randomly assigned to one of two groups: control group (GC) or experimental group (GE). The GE performed 3 sets of 15 repetitions with one-minute rest between sets, three times a day of PMK during the 6 days of immobilization, while the GC did not perform PKM during its immobilization. A 2-way ANOVA test (group x measurement) indicated non-significant differences in strength or AEM. However, the strength of the GC decreased by 23.75%, while increased by 33.19% in the GE. The results suggest that a period of immobilization of the elbow of 6 days was not enough for the strength or the AEM to decrease significantly, which means that the PMK is not necessary in periods of immobilization of less than 6 days.

Isokinetic ankle muscle strength is reduced in recreational runners with medial tibial stress syndrome and is not associated with pain

Abstract Aim: The purpose of this study was to investigate the strength and ratios of the plantar flexors and ankle dorsiflexors in recreational runners with medial tibial stress syndrome and to assess the association between muscle strength and the level of pain in this population. Methods: Two groups (control and medial tibial stress syndrome) of eighteen runners each participated in this cross-sectional study. Isokinetic dynamometry was used to evaluate muscle strength, and for the analysis, the normalized isokinetic peak torque controlled by gender was used. Results: The medial tibial stress syndrome group showed lower normalized isokinetic peak torque in the dorsiflexors in the concentric (p = 0.008) eccentric (p = 0.011) contraction, as well as a lower plantar flexor, normalized isokinetic peak torque in the concentric (p = 0.001) and eccentric (p = 0.02) when compared to the control group. However, there was no difference in the normalized isokinetic peak torque ratio representative of the stance (p = 0.62) and swing phase (p = 0.16), and the level of pain was not correlated with the strength concentric (p = 0.32) and eccentric (p = 0.621) of plantar flexors, nor to the concentric (p = 0.21) and eccentric of dorsiflexors (p = 0.54). Conclusion: Recreational runners with MTSS showed decreased muscle strength in the sagittal plane of the ankle, no correlation with the level of pain, and no changing the ratio between plantar flexors and dorsiflexors.