High Cognitive Effort Prior to Velocity-Based Training Sessions Reduces Rate of Force Development but Not Maximum Strength Gains in Untrained Male Adults.

This study aimed to analyze the chronic effect of high cognitive effort immediately before resistance exercise sessions on neuromuscular performance in untrained male adults. We used a mixed experimental design, with the group as between-participants factor and time as within-participants factor. Thirty-four participants were randomly assigned to two parallel groups: high cognitive effort (n = 17) and control (n = 17). Subjects in the control group were seated for 30 min before the resistance exercise sessions, while the high cognitive effort group completed incongruent trials of the Stroop task until subjective mental fatigue was present immediately before resistance exercise sessions. Participants attended 45 sessions over 15 weeks, consisting of three familiarizations, three baseline evaluations, 36 velocity-based training sessions, and three postexperiment evaluation sessions. Rate of force development (RFD) during the isometric mid-thigh pull, half back-squat 1-RM, and countermovement jump (CMJ) were measured before and after the 12-week intervention. A significant group × time interaction effect was found for the average RFD at 0-250 ms (p < 0.05), with greater improvements for the control group than for the high cognitive effort group. There was no group × time interaction for half back-squat 1-RM (p > 0.05). Also, there was no group × time interaction for CMJ (p > 0.05). In conclusion, repeated high cognitive effort immediately prior to resistance exercise sessions is a phenomenon that can induce greater early velocity loss and, consequently, impairs the improvements in RFD. However, this did not inhibit the increased performance for explosive strength and CMJ in male untrained adults. High cognitive effort before resistance exercise sessions should be avoided.

Post-COVID-19 cognitive symptoms in patients assisted by a teleassistance service: a retrospective cohort study.

Introduction: Four years after the onset of the COVID-19 pandemic, the frequency of long-term post-COVID-19 cognitive symptoms is a matter of concern given the impact it may have on the work and quality of life of affected people. Objective: To evaluate the incidence of post-acute COVID-19 cognitive symptoms, as well as the associated risk factors. Methods: Retrospective cohort, including outpatients with laboratory-confirmed COVID-19 and who were assisted by a public telehealth service provided by the Telehealth Network of Minas Gerais (TNMG), during the acute phase of the disease, between December/2020 and March/2022. Data were collected through a structured questionnaire, applied via phone calls, regarding the persistence of COVID-19 symptoms after 12 weeks of the disease. Cognitive symptoms were defined as any of the following: memory loss, problems concentrating, word finding difficulties, and difficulty thinking clearly. Results: From 630 patients who responded to the questionnaire, 23.7% presented cognitive symptoms at 12 weeks after infection. These patients had a higher median age (33 [IQR 25-46] vs. 30 [IQR 24-42] years-old, p = 0.042) with a higher prevalence in the female sex (80.5% vs. 62.2%, p < 0.001) when compared to those who did not present cognitive symptoms, as well as a lower prevalence of smoking (8.7% vs. 16.2%, p = 0.024). Furthermore, patients with persistent cognitive symptoms were more likely to have been infected during the second wave of COVID-19 rather than the third (31.0% vs. 21.3%, p = 0.014). Patients who needed to seek in-person care during the acute phase of the disease were more likely to report post-acute cognitive symptoms (21.5% vs. 9.3%, p < 0,001). In multivariate logistic regression analysis, cognitive symptoms were associated with female sex (OR 2.24, CI 95% 1.41-3.57), fatigue (OR 2.33, CI 95% 1.19-4.56), depression (OR 5.37, CI 95% 2.19-13.15) and the need for seek in-person care during acute COVID-19 (OR 2.23, CI 95% 1.30-3.81). Conclusion: In this retrospective cohort of patients with mostly mild COVID-19, cognitive symptoms were present in 23.7% of patients with COVID-19 at 12 weeks after infection. Female sex, fatigue, depression and the need to seek in-person care during acute COVID-19 were the risk factors independently associated with this condition.

Fear and Coping with Death in Intensive Care Nurses: a Structural Model Predictor of Compassion Fatigue.

OBJECTIVES: To determine the effect of fear and coping with death on compassion fatigue in nurses working in the intensive care unit. METHODS: Correlational-predictive design, applied in 245 nurses working in the intensive care unit through intentional sampling. The study applied a personal data card, the Collet-Lester Fear of Death Scale (α=0.72), the Bugen Fell of Death Scale (α=0.82), and the Empathy Exhaustion Scale (α=0.80). Descriptive and inferential statistics were performed, such as Spearman's test and a structural equation model. RESULTS: The work had 255 nurses who participated, finding a relationship among fear and coping toward death and compassion fatigue (p<0.01), together with the equation model showing that fear and coping toward death have a positive effect in 43.6% on compassion fatigue. CONCLUSIONS: Fear and coping with death have an effect on compassion fatigue in nurses working in the intensive care unit, so that when working in a critical area it can cause health effects.

Fear and Coping with Death in Intensive Care Nurses: a Structural Model Predictor of Compassion Fatigue / Miedo y afrontamiento ante la muerte del usuario: un modelo estructural predictor de la fatiga por compasión en enfermeros de cuidados intensivos / Medo e enfrentamento da morte do usuário: um modelo estrutural preditivo da fadiga por compaixão em enfermeiros de terapia intensiva

Objective. To determine the effect of fear and coping with death on compassion fatigue in nurses working in the intensive care unit. Methods. Correlational-predictive design, applied in 245 nurses working in the intensive care unit through intentional sampling. The study applied a personal data card, the Collet-Lester Fear of Death Scale (α=0.72), the Bugen Fell of Death Scale (α=0.82), and the Empathy Exhaustion Scale (α=0.80). Descriptive and inferential statistics were performed, such as Spearman's test and a structural equation model. Results. The work had 255 nurses who participated, finding a relationship among fear and coping toward death and compassion fatigue (p<0.01), together with the equation model showing that fear and coping toward death have a positive effect in 43.6% on compassion fatigue. Conclusion. Fear and coping with death have an effect on compassion fatigue in nurses working in the intensive care unit, so that when working in a critical area it can cause health effects

Objetivo. Determinar el efecto del miedo y afrontamiento ante la muerte sobre la fatiga por compasión en enfermeros que laboran en la unidad cuidados intensivos. Método. Diseño correlacional-predictivo. A través de un muestreo intencional se seleccionaron 255 enfermeros que laboraban en Unidades de Cuidados Intensivos de Adultos de hospitales de la Península de Yucatán (México). Se aplicó una cédula de datos personales, la escala de miedo a la muerte de Collet-Lester (α=0.72), la escala de Bugen de afrontamiento de la muerte (α=0.82) y la escala de agotamiento por empatía (α=0.80). Se realizó estadística descriptiva e inferencial como prueba de Spearman y un modelo de ecuación estructural. Resultados. Se encontró relación del miedo y el afrontamiento hacia la muerte con la fatiga por compasión (p<0.01). Adicionalmente, el modelo de ecuaciones muestra que el miedo y el afrontamiento hacia la muerte predice en un 43.6% sobre la fatiga por compasión. Conclusión. El miedo y el afrontamiento hacia la muerte tienen efecto sobre la fatiga por compasión en los enfermeros que laboran en la unidad de cuidados intensivos, por lo que al estar laborando en esta área crítica puede provocar afectaciones en su estado de salud.

Objetivo. Determinar o efeito do medo e enfrentamento da morte na fadiga por compaixão em enfermeiros que atuam em Unidade de Terapia Intensiva (UTI). Métodos. Desenho preditivo correlacional. Por meio de amostragem intencional, foram selecionados 255 enfermeiros que trabalhavam em Unidades de Terapia Intensiva de Adultos de hospitais da Península de Yucatán (México). Foi aplicada uma ficha de dados pessoais, a escala de medo da morte de Collet -Lester (α=0.72), a escala de Bugen de enfrentamento da morte (α=0.82) e a escala de exaustão por empatia (α=0.80). Foram realizadas estatísticas descritivas e inferenciais como o teste de Spearman e um modelo de equação estrutural. Resultados. Encontrou-se relação entre medo e enfrentamento da morte e fadiga por compaixão (p<0.01). Além disso, o modelo de equação mostra que o medo e o enfrentamento da morte preveem 43.6% da fadiga por compaixão. Conclusão. O medo e o enfrentamento da morte afetam a fadiga por compaixão em enfermeiros que atuam em UTI, portanto, trabalhar nessa área crítica pode afetar seu estado de saúde.

Síndrome de Burnout en estudiantes y profesionales de la Carrera de Terapia Ocupacional de la Universidad Central del Ecuador / Burnout syndrome in students and professionals of the Occupational Therapy Career of the Central University of Ecuador

Introducción: El síndrome de Burnout es un fenómeno muy común en los diferentes am-bientes de trabajo, pero estudios de prevalencia en profesionales y estudiantes de terapia ocupacional son limitados.Objetivo: Establecer la presencia de síndrome de Burnout en estudiantes y profesionales de los centros de práctica de la carrera de Terapia Ocupacional de la Universidad Central del Ecuador.Material y métodos: Diseño de estudio observacional, descriptivo, de corte transversal, en 177 estudiantes de la carrera de Terapia Ocupacional y 35 profesionales en el área que laboran en los centros de práctica vinculados a la práctica preprofesional. En cada suje-to se determinó agotamiento emocional, despersonalización y falta de realización personal mediante la Escala Maslach Burnout Inventory; la presencia de nivel alto en las subescalas agotamiento emocional y despersonalización y nivel bajo en realización personal define sín-drome de Burnout. Se calculó la prevalencia del síndrome en estudiantes y profesionales y la correlación con años de ejercicio laboral y sexo.Resultados: El 2.9 % (1/35) de los profesionales y 4.5 % (8/177) de estudiantes presentaron síndrome Burnout, el que se relacionó con las variables ambientales personales incluidas en la escala de Maslach. Del 45.83% al 82.14 % de estudiantes presentaron niveles bajos de cansancio emocional y despersonalización, mientras que, del 37.14 % al 52.94 %, presenta-ron niveles medios de realización personal.Conclusión: La prevalencia del síndrome de Burnout es baja en los profesionales y en los estudiantes de la carrera de Terapia Ocupacional que hacen prácticas preprofesionales en diferentes instituciones.

Introduction: Burnout syndrome is a very common phenomenon in different work environments; however, prevalence studies in occupational therapy professionals and students are limited.Objective: To establish the presence of Burnout syndrome in students and professionals at practice centers of the Occupational Therapy Career from Universidad Central del Ecuador.Material and methods: Cross-sectional, descriptive, observational study design in 177 stu-dents belonging to the Occupational Therapy Career and 35 professionals in the area who work in the practice centers linked to pre-professional practice. Emotional exhaustion, de-personalization and lack of personal fulfillment were determined in each subject using the Maslach Burnout Inventory Scale; the presence of a high level in the emotional exhaustion and depersonalization subscales and a low level of personal fulfillment defines Burnout syn-drome. The prevalence of Burnout syndrome in students and professionals and the correla-tion with years of work practice and gender were calculated.Results: 2.9% (1/35) of the professionals and 4.5% (8/177) of the students presented Bur-nout syndrome, which was related to the personal environmental variables included in the Maslach scale. From 45.83% to 82.14% of students presented low levels of emotional fati-gue and depersonalization; on the other hand, from 37.14% to 52.94% presented average levels of personal fulfillment.Conclusion: The prevalence of Burnout syndrome is low as in professionals as in students of the Occupational Therapy Career who do pre-professional practices in different institutions.

Relations between psychological quality and training in basketball players / Relações entre a qualidade psicológica e o treinamento em jogadores de basquetebol / Relaciones entre la calidad psicológica y el entrenamiento en jugadores de baloncesto

ABSTRACT Introduction Psychological monitoring and psychological intervention of basketball players has been a focus of attention in sports training. In basketball, players consume much physical energy and also much mental energy. Psychological tension and emotional changes cause basketball players to restrict their technical abilities. Objective Analyze the relationship between sport-induced mental fatigue and pre-game emotions in basketball players. Methods This paper selects 40 basketball players as research volunteers. A survey questionnaire and mathematical statistics were used to analyze the relationship between basketball players' mental fatigue, training level, and pre-game emotions. This paper analyzes the relationship between psychological quality and training level of basketball players. Results There were significant correlations between various dimensions of sport-induced mental fatigue and basketball players' pregame emotions. Basketball players' pre-game self-confidence is mainly affected by training game competence and excessive energy consumption. Conclusion The psychological quality of basketball players is significantly correlated with the level of training. Athletes should pay attention to psychological quality training in sports competitions. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

RESUMO Introdução O acompanhamento psicológico e a intervenção psicológica dos jogadores de basquete tem sido foco de atenção no treinamento esportivo. No basquetebol, os jogadores consomem muita energia física e também muita energia mental. A tensão psicológica e as alterações emocionais fazem com que os jogadores de basquetebol restrinjam suas habilidades técnicas. Objetivo Analisar a relação entre a fadiga mental induzida pelo esporte e as emoções pré-jogo nos jogadores de basquete. Métodos Este trabalho seleciona 40 jogadores de basquetebol como voluntários de pesquisa. Utilizou-se um questionário de pesquisa e estatísticas matemáticas para analisar a relação entre a fadiga mental dos jogadores de basquetebol, o nível de treinamento e as emoções pré-jogo. Este trabalho analisa a relação entre a qualidade psicológica e o nível de treinamento dos jogadores de basquetebol. Resultados Houve correlações significativas entre as várias dimensões da fadiga mental induzida pelo esporte e a emoção no pré-jogo dos jogadores de basquete. A autoconfiança dos jogadores de basquetebol antes do jogo é afetada principalmente pela competência dos jogos de treinamento e pelo consumo excessivo de energia. Conclusão A qualidade psicológica dos jogadores de basquetebol está significativamente correlacionada com o nível de treinamento. Os atletas devem prestar atenção ao treinamento de qualidade psicológica nas competições esportivas. Nível de evidência II; Estudos terapêuticos - investigação dos resultados do tratamento.

RESUMEN Introducción El acompañamiento psicológico y la intervención psicológica de los jugadores de baloncesto han sido objeto de atención en el entrenamiento deportivo. En el baloncesto, los jugadores consumen mucha energía física y también mucha energía mental. La tensión psicológica y los cambios emocionales hacen que los jugadores de baloncesto limiten sus habilidades técnicas. Objetivo Analizar la relación entre la fatiga mental inducida por el deporte y las emociones previas al partido en jugadores de baloncesto. Métodos Este trabajo selecciona a 40 jugadores de baloncesto como voluntarios para la investigación. Para analizar la relación entre la fatiga mental de los jugadores de baloncesto, el nivel de entrenamiento y las emociones previas al partido se utilizó un cuestionario de encuesta y estadísticas matemáticas. Este artículo analiza la relación entre la calidad psicológica y el nivel de entrenamiento de los jugadores de baloncesto. Resultados Hubo correlaciones significativas entre las diversas dimensiones de la fatiga mental inducida por el deporte y las emociones previas al partido de los jugadores de baloncesto. La autoconfianza de los jugadores de baloncesto antes del partido se ve afectada principalmente por la competencia del juego de entrenamiento y el consumo excesivo de energía. Conclusión La calidad psicológica de los jugadores de baloncesto está significativamente correlacionada con el nivel de entrenamiento. Los deportistas deben prestar atención a la calidad psicológica del entrenamiento en las competiciones deportivas. Nivel de evidencia II; Estudios terapéuticos - investigación de los resultados del tratamiento.

Comparison of tomographic reports by radiologists and non-radiologists in trauma and interferences in management in a trauma reference center / Comparação de laudos tomográficos por médicos radiologistas x não radiologistas no trauma e interferências na conduta em um centro de referência de trauma

ABSTRACT Objective: diagnostic errors during the interpretation of an imaging test by the physician can lead to increased mortality and length of hospital stay for patients. The rate of divergence in the report given by a radiologist and an Emergency Physicians (EP) can reach over 20%. The objective of this study was to compare the unofficial tomographic reports issued by EP with the official reports issued by radiologists. Methods: a cross-sectional study, in which interpretations of the exams (documented in the medical records by the EP) of all patients undergoing computed tomography (CT) of the chest, abdomen or pelvis performed in the emergency room, at an interval of 8 months, were evaluated. These data were compared with the official reports of the radiologist (gold standard). Results: 508 patients were included. The divergence between EP and the radiologist occurred in 27% of the cases. The most common type of divergence was the one not described by the EP, but described by the radiologist. The chance of having divergence in a case of multiple trauma is 4.93 times greater in relation to the case of only blunt trauma in one segment. A statistically relevant difference was also found in the length of stay of patients who had different interpretations of the CT scans. Conclusion: the study found a relatively high divergence rate between the EP report and the official radiologist report. However, less than 4% of these were considered to be clinically relevant, indicating the ability of the EP to interpret it satisfactorily.

RESUMO Objetivo: os erros diagnósticos durante a interpretação de um exame de imagem pelo médico podem acarretar aumento da mortalidade e do tempo de internação dos pacientes. A taxa de divergência entre o laudo dado por um médico radiologista e a avaliação preliminar de um Médico Emergencista (ME) pode chegar a mais de 20%. O objetivo deste trabalho foi comparar as avaliações dos exames de imagem realizadas pelo ME com os laudos oficiais emitidos pelos radiologistas. Métodos: estudo seccional e transversal, no qual foram avaliadas interpretações dos exames (documentadas no prontuário pelos ME) de todos os pacientes submetidos à tomografia computadorizada (TC) de tórax, abdome ou pelve realizada na emergência, em um intervalo de 8 meses. Esses dados foram comparados com os laudos oficiais do médico radiologista (padrão ouro). Resultados: foram incluídos 508 pacientes no estudo. A divergência entre ME e radiologista ocorreu em 27% dos casos. O tipo de divergência mais incidente foi a não descrita pelo ME, mas descrita pelo radiologista. A chance de haver divergência em um caso de politrauma é 4,93 vezes maior em relação ao caso de somente trauma contuso em um segmento. Foi encontrada também uma diferença estatisticamente relevante no tempo de internamento dos pacientes que tiveram interpretações divergentes das tomografias. Conclusão: o estudo encontrou uma taxa de divergência relativamente alta entre o laudo do ME e o laudo oficial do radiologista. Contudo, menos de 4% dessas foram consideradas como clinicamente relevantes, indicando a capacidade dos ME em interpretar os exames de imagem de forma satisfatória.

Percepción de carga mental de trabajo en personas funcionarias administrativas que se desempeñan en una municipalidad de Chile / Perception of mental workload in administrative officials who work in a municipality in Chile

Objetivo: Caracterizar la percepción de carga mental de trabajo en personal administrativo de una municipalidad de Chile. Metodología: Investigación de abordaje cuantitativo, con un diseño descriptivo, de corte transversal. Se utilizó un cuestionario que consta de dos partes: a) antecedentes biosociodemográficos y b) escala subjetiva de carga mental de trabajo (ESCAM), censándose a un total de 47 personas funcionarias administrativas de una municipalidad de Chile. Para el análisis de datos, se usó el programa ''Statistical Package of Social Sciences'' (SPSS) versión 25.0. Posteriormente, se procedió al cálculo estadístico descriptivo con cálculo de media, desviación estándar y rango. Se respetaron los principios éticos de Ezequiel Emmanuel y se contó con la autorización del comité ético científico. Resultados: Las personas trabajadoras presentan nivel de carga mental global medio alto (𝒙̅: 3,38); los factores con mayor exposición a carga mental son características de la tarea (𝒙̅: 4,09), demanda cognitiva y complejidad de la tarea (𝒙̅: 3,89), el factor ritmo de trabajo es el que muestra resultados más bajos (𝒙̅: 2,47). Conclusión: Las características del trabajo realizado por el personal administrativo implica un esfuerzo mental asociado al cumplimiento de la tarea, durante la cual están expuestos a interrupciones y distracciones. Esta característica genera en ellos una percepción de agotamiento y dificultad para relajarse después de terminada la jornada, lo que podría producir efectos negativos en su salud física y mental.

Aim: To characterize the perception of mental workload in administrative employees of a municipality in Chile. Methods: This was a quantitative study with a descriptive and cross-sectional design. A two-part questionnaire (bio sociodemographic background and subjective scale of mental workload (SMWS)) was used to survey a total of 47 administrative employees of a municipality in Chile. The 25.0 version of the Statistical Package of Social Sciences (SPSS) was used for the data analysis; this was followed by descriptive statistical calculation of mean, standard deviation, and range. The ethical principles of Ezequiel Emmanuel were respected, and the authorization of the scientific ethical committee was obtained. Results: Those who worked presented a high average global mental workload level (𝒙̅: 3.38). The factors with the highest mental workload exposure were task characteristics (𝒙̅: 4.09) and cognitive demand and task complexity (𝒙̅: 3.89) whereas the work rhythm factor showed the lowest results (𝒙̅: 2.47). Conclusion: The characteristics of the work performed by the administrative personnel force them to perform a mental effort associated with the completion of the task exposed to interruptions and distractions. These characteristics tires them and causes them difficulties to relax after the end of the day; this could cause negative effects on their physical and mental health.

Objetivo: Caracterizar a percepção da carga mental de trabalho em funcionários administrativos de uma prefeitura do Chile. Metodologia: Pesquisa de abordagem quantitativa, com desenho descritivo e de corte transversal. Quarenta e sete funcionários administrativos de uma prefeitura do Chile responderam a um questionário composto por duas partes: a) antecedentes sociodemográficos e b) escala subjetiva de carga mental de trabalho (ESCAM). Os dados foram analisados com o programa ''Statistical Package of Social Sciences'' (SPSS) versão 25.0, foi considerada a estatística descritiva com cálculos de média, desvio padrão e amplitude. O estudo foi aprovado pelo Comitê de Ética em Pesquisa com seres humanos e foram seguidos os princípios éticos de Ezequiel Emmanuel. Resultados: As pessoas que trabalham apresentam nível de carga mental global médio-alto (𝒙̅: 3,38); os fatores com maior exposição à carga mental são características da tarefa (𝒙̅: 4,09) e demanda cognitiva e complexidade da tarefa (𝒙̅: 3,89). O fator ritmo de trabalho é o que apresenta os menores resultados (𝒙̅: 2,47). Conclusão: As características do trabalho realizado pelos funcionários administrativos os obriga a um esforço mental associado ao cumprimento da tarefa, em que estão expostos a interrupções e distrações. Esta característica gera nos trabalhadores uma percepção de cansaço e dificuldade em relaxar após a jornada de trabalho, o que poderia produzir efeitos negativos em sua saúde física e mental.

Long-lasting brain fog is related with severity clusters of symptoms in COVID-19 patients

BACKGROUND: COVID-19 patients may experience Long-lasting symptoms from weeks to even months. AIM: To evaluate long-term cognitive impairment based on the severity of symptoms of COVID-19 infection in a primary health system setting. Material and Methods: From a database of 363 patients, 83 cases aged 47 ± 15 years, (58% females) were selected from June to August 2020. In patients who survived the virus, 24 infection-related symptoms were collected to create three severity clusters (mild, moderate, and severe). The follow-up time was at least seven months. Comparing the first two clusters with the severe cluster, the existence of brain fog and risk factors (obesity, hypertension, diabetes, chronic lung disease, and hypothyroidism) were analyzed. RESULTS: Thirty-one patients (37%) had persistent symptoms lasting up to 240 days. Fifty-one patients (61%) experienced brain fog. Concentration was affected by symptom severity (odds ratio [OR] 3.63, 95% confidence interval [CI] 1.26-10.46, p = 0.02). Short- or long-term memory loss was not affected. Moreover, symptom severity was related to brain fog (OR 3.16, 95% CI 1.05-9.51, p = 0.04). Patients with persistent symptoms had a concentration impairment associated with severity patterns (OR 24.3, 95% CI 1.73-340.11, p = 0.03). Conclusions: Brain fog is associated with symptom severity in COVID-19 survivors and lasts for more than eight months.

ANTECEDENTES: Los pacientes que han tenido COVID-19 pueden experimentar síntomas persistentes que duran semanas a meses. OBJETIVO: Evaluar el deterioro cognitivo a largo plazo en función de la severidad de los síntomas de la infección por COVID-19, en un escenario de sistema primario de salud. Material y Métodos: De una base de datos de 363 pacientes se seleccionaron 83 casos de 47 ± 15 años (58% mujeres), de junio-agosto de 2020. Se recopilaron 24 síntomas relacionados con la infección, creando tres grupos (leve, moderado y severo), en pacientes que padecieron y sobreviven al virus. El tiempo de seguimiento fue de al menos siete meses. La existencia de niebla cerebral y de factores de riesgo (obesidad, hipertensión, diabetes, enfermedad pulmonar crónica e hipotiroidismo) se comparó los dos grupos de severidad más bajos con el nivel superior. RESULTADOS: Treinta y un pacientes (37%) tuvieron síntomas prolongados con una duración de hasta 240 días. Cincuenta y un pacientes (61%) mostraron niebla cerebral. El deterioro de la concentración fue afectado por la severidad (Razón de riesgo (RR) = 3,63, Intervalos de confianza (IC) 95%: 1,26-10,46, p = 0,02). La pérdida de memoria a corto o largo plazo no fue afectada. El grupo con mayor severidad se asoció a niebla cerebral (RR = 3,16, IC95%: 1,05-9,51, p = 0,04). Los portadores de síntomas prolongados tuvieron una alteración de la concentración asociado a severidad (RR: 3,16, IC95%: 1,05-9,51, p= 0,04). Conclusiones: La niebla cerebral está relacionada con la severidad de los síntomas en supervivientes de COVID-19 permaneciendo por más de ocho meses.

Fatiga laboral percibida en conductores de compañías de transporte de Orellana, Pichincha y Guayas / Perceived work fatigue in drivers of transport companies in Orellana, Pichincha, and Guayas

RESUMEN Introducción: los conductores de transporte están expuestos a largas jornadas que pueden provocar fatiga física por excesiva concentración visual y esfuerzos en diversos músculos. La fatiga laboral que experimentan puede ser definida como un estado no placentero, por la saturación de actividad muscular, mental y afectiva que induce a enfermedades en los sistemas gástrico, circulatorio e inmunológico, al igual que a trastornos del sueño. Objetivo: analizar la fatiga laboral percibida en relación con sus factores asociados, en choferes de compañías de transporte provenientes de tres provincias de Ecuador. Materiales y métodos: se realizó un estudio de tipo no experimental, prospectivo, analítico y transversal, en 141 conductores profesionales de tres provincias ecuatorianas. Se les aplicó el cuestionario sueco de fatiga ocupacional SOFI-SM, que evaluó la fatiga física, mental, psíquica e irritabilidad. Se realizó un análisis bivariado con las variables nominales de edad, escolaridad y antigüedad, a través de las pruebas Chi cuadrado de Pearson y V de Cramér. Para la comprobación de fatiga por provincia de procedencia, se realizó el análisis de covarianza mediante la prueba de Kruskal-Wallis. Resultados: se evidenció el nivel inadecuado e inaceptable de fatiga física, con una prevalencia del 64,5 % de inferencia estadística con el estado civil. No se presentaron diferencias significativas entre las puntuaciones totales del instrumento y la provincia de procedencia. Conclusiones: el nivel alto de fatiga indicó la urgencia de implementar actividades de recuperación, de adecuación de horarios y de contratación de más personal, puesto que este agotamiento ocasiona impericias, distracciones y malas decisiones que conllevan a los accidentes de tránsito. Es necesario intervenir desde la medicina laboral en la evaluación de la salud de los conductores para conocer cuáles son las enfermedades preexistentes que pudieran estar influyendo en la fatiga laboral.

ABSTRACT Introduction: transport drivers are exposed to long working days that can cause physical fatigue due to excessive visual concentration and effort in various muscles. The occupational fatigue they experiment may be defined as an unpleasant state, because of the saturation of the muscular, mental and affective activity that induces diseases in the gastric, circulatory and immunological systems as well as sleep disorders. Objective: to analyze perceived occupational fatigue in relation with its associated factors, in drivers of transportation companies from three provinces of Ecuador. Materials and methods: a non-experimental, prospective, analytical and cross-sectional study was conducted in 141 professional drivers of three Ecuadorian provinces. The Swedish occupational fatigue questionnaire SOFI-SM was applied, which evaluated the physical, mental, psychical fatigue and irritability. A bivariate analysis was carried out with the nominal variables age, schooling, and seniority through Pearsonꞌs Chi squared and Cramer's tests. To verify the fatigue by province of origin, the analysis of covariance was performed using the Kruskal-Wallis test. Results: the inadequate and unacceptable level of physical fatigue was evidenced, with a prevalence of 64.5 % of statistical inference with marital status. There were no significant differences between the total scores of the instrument and the province of origin. Conclusions: the high level of fatigue indicated the urgency of implementing recovery activities, adapting schedules and hiring more staff, since this exhaustion causes imperfections, distractions and bad decisions that lead traffic accidents. It is necessary to intervene from the occupational medicine in the evaluation of the health of the drivers to find out which pre-existing diseases could be influencing occupational fatigue.

Effects of smartphone use before resistance exercise on inhibitory control, heart rate variability, and countermovement jump.

BACKGROUND: The effect of MF induced by exposure time to social media smartphone apps on inhibitory control, heart rate variability (HRV), and high-intensity physical effort following a resistance exercise session might indicate whether strength and conditioning professionals should suggest avoiding smartphone usage before a resistance exercise session. AIM: The objective of this study was to analyze the effect of mental fatigue on inhibitory control, HRV, and countermovement jump (CMJ) in trained adults after resistance exercise. METHODS: A total of 16 trained males (21.4 ± 3.3 years) volunteered in this study. The participants performed resistance exercises with and without mental fatigue. The Stroop Task, countermovement jump, and heart rate variability were evaluated before and after the resistance exercise. The participants used smartphones in the mental fatigue condition, whereas the participants watched TV in the control condition. RESULTS: No condition × time interaction was found for the Stroop accuracy (p = 0.87), CMJ (p = 0.68), SDNN (p = 0.15), or pNN50 (p = 0.15) in the heart rate variability. An interaction was found for Stroop response time (p = 0.01) with a higher response time for the mental fatigue condition (p = 0.01). CONCLUSIONS: Mental fatigue impaired the inhibitory control performance after a resistance exercise session in trained adults.

No Effects of Mental Fatigue and Cerebral Stimulation on Physical Performance of Master Swimmers.

Background: Mental fatigue is a psychobiological state caused by extended periods of cognitive effort, and evidence suggests that mentally fatigued athletes present impaired physical performance. Different ergogenic aids have been proposed to counteract the deleterious effects of mental fatigue, but whether brain stimulation can counteract mental fatigue is still unknown. This scenario is even more obscure considering the effects of these interventions (mental fatigue induction and brain stimulation) in a very experienced population consisting of master athletes. Method: Ten master swimmers (30 ± 6 years old and 14 ± 8 years of experience) participated in the study. They underwent four experimental conditions before an 800-m freestyle test: mental fatigue with brain stimulation; mental fatigue without brain stimulation; absence of mental fatigue with brain stimulation; and absence of mental fatigue and no brain stimulation. Mental fatigue was induced by a cognitively demanding Stroop Color Test, whereas stimulation was applied on the temporal cortex. After that, the athletes swan 800 m as fast as possible and provided their ratings of perceived exertion (RPE) every 200 m. Results: Mental fatigue was effectively induced, as evidenced by a greater fatigue perception and more errors in the last blocks of the cognitive task. Mental fatigue induction did not influence performance (time to complete the swimming trial) and RPE. Similarly, brain stimulation failed to change these two parameters, regardless of mental fatigue induction. Conclusion: The prolonged physical performance of experienced master athletes is not influenced, under the present conditions, by mental fatigue induction, cerebral stimulation, and their association.

Mental Fatigue From Smartphone Use Reduces Volume-Load in Resistance Training: A Randomized, Single-Blinded Cross-Over Study.

We investigated the acute effects of mental fatigue induced by 30-minute use of smartphone social network apps on volume load in resistance training among recreationally trained adults. Sixteen (n = 16) adults of both sexes performed three sets of a half back-squat exercise to failure with 80% of 15RM, interspersed with 3-minutes of passive recovery between sets, before and after two different cognitive tasks: (a) use of smartphone social network apps; and (b) watching a documentary. We assessed mechanical variables and ratings of perceived exertion during the strength exercise. Relative to the documentary-viewing control condition, a 30-minute exposure to smartphone social network apps led participants toward increased perception of mental fatigue (p = 0.004) and lower volume-load during the strength exercise (p = 0.006). There were no significant differences in perceived exertion between conditions (p = 0.54), participants' motivation (p = 0.277), intra-set mechanical variables (p > 0.05), or blood lactate concentrations (p = 0.36). Our findings of an isolated possible higher-than normal RPE without changes in physiological variables, accompanying the lower volume-load in the mentally-fatigued participants support psychological, rather than physiological, bases for mental fatigue effects.

Effect of Mindfulness Training on Fatigue and Recovery in Elite Volleyball Athletes: A Randomized Controlled Follow-Up Study.

Volleyball is a team sport with high physical and perceptual-cognitive demand, hence, increasing the perception of physical and mental fatigue during a competition. To alleviate fatigue (physical and mental), mindfulness and music have been proposed. The aim of this study was to analyze the effect of mindfulness-based mental versus music training on mental fatigue, physical fatigue, and recovery in elite competitive female volleyball athletes using a randomized two-controlled study with follow-up. Participants were 30 elite female Brazilian volleyball athletes. Athletes were randomly assigned to the following groups: 1) mindfulness-based mental training group (MBMT); 2) music-based training group (MBT); or 3) control group (CG). Three variables were evaluated as follows: 1) recovery based on total quality recovery; 2) mental fatigue visual analog scale; and 3) physical fatigue visual analog scale. Regarding recovery, there was no difference between the MBMT, MBT, and CG groups (p > 0.05). A difference in mental fatigue was noted between MBT and CG at follow-up [F(2,26) = 5.71, p = 0.009; large]. Regarding physical fatigue, there was no difference between the MBMT, MBT, and CG groups (p > 0.05). The mindfulness intervention effectively attenuated the mental fatigue caused by competition in volleyball athletes. These results will assist coaches and staff in providing fatigue management and reinforce the applicability of mental training in sports.

Early Alpha Reactivity is Associated with Long-Term Mental Fatigue Behavioral Impairments.

The quantitative analysis of electroencephalogram (qEEG) is a suitable tool for mental fatigue (MF) assessment. Here, we evaluated the effects of MF on behavioral performance and alpha power spectral density (PSD) and the association between early alpha PSD reactivity and long-term behavioral MF impairments. Nineteen right-handed adults (21.21 ± 1.77 years old) had their EEG measured during five blocks of the visual oddball paradigm (~ 60 min). A paired t-test was used to compare first and last block values of cognitive performance and alpha PSD. The sample was divided into high (HAG) and low alpha group (LAG) by early alpha PSD median values. The behavioral performance of the HAG and LAG was compared across the blocks by a two-way ANOVA with repeated measures (groups and blocks). MF impairs general behavioral performance and increases alpha PSD. The HAG presents more behavioral impairment when compared to LAG across the task. Simple linear regression between early alpha PSD and behavioral performance across the task can predict 19 to 39% of variation in general behavior impairment by MF. In conclusion, MF induction impairs general behavioral and increases alpha PSD. The other finding was that higher alpha PSD reactivity is associated to higher long-term behavioral impairments of MF. This work contributes to existing knowledge of MF by providing evidence that the possibility of investigating early electrophysiological biomarkers to predict long-term MF impairments.

Fadiga mental ocasionada por tarefa cognitiva de imagética motora: análise sistemática / Mental failure occurred by the cognitive task of motor imagine: systematic analysis

O objetivo geral deste estudo é analisar, por meio da revisão sistemática da literatura, os efeitos da fadiga mental provocada por uma tarefa cognitiva de imagética motora. Para a análise literária, foram utilizados os bancos de dados eletrônicos: Public Medline (PubMed), Scientific Electronic Library Online (Scielo) e Scopus. Foram analisados estudos experimentais, realizados em humanos, nos idiomas português e inglês, publicados de 2004 a 2019. As palavras chaves utilizadas foram: motor imagery/ imagética motora, sustained attention/ atenção sustentada e mental fadigue/ fadiga mental. A tarefa de Imagética Motora (IM) é definida como uma execução mental do movimento do corpo, entretanto, sem nenhuma saída motora. Alguns autores sugerem que o indivíduo começaria a desenvolver fadiga acima de 60 trilhas de imagética motora. Dessa forma, pode comprometer os resultados de protocolos terapêuticos e/ou desportivos, além de desempenhar um risco eminente de problemas de saúde, como é o caso das doenças cardiovasculares, epiléticas e Karoshi (morte por excesso de trabalho). Sendo assim, em tarefas mais prolongadas, a fadiga mental diminui o desempenho na tarefa e aumenta o tempo para a sua execução. Portanto, conclui-se que o tempo da tarefa cognitiva interfere no tempo de reação devido a fadiga mental provocado pela tarefa cognitiva de atenção sustentada.

The general objective of this study is to analyze the effects of mental fatigue caused by cognitive task of motor imagery through the systematic analysis of the literature. For the literary analysis we used the electronic databases: Public Medline (PubMed), Scientific Electronic Library Online (Scielo) and Scopus. The experimental studieswere performed in humans, both Portuguese and English, published from 2004 to 2019. The keywords used were motor imagery, sustained attention and mental fatigue. The task of Motor Imagery (IM) it is as a mental execution of body movement, however, with not motor output response. Some authors suggest people begin to develop fatigue that over 60 tracks of motor imagery. In this way, it can compromise the results of therapeutic and/or sports protocols, as well as pose an imminent risk of health problems, such as cardiovascular diseases, epilepsy and Karoshi (death from overwork). Thus, in longer tasks, mental fatigue decreases performance on the task and increases the time for its execution. Therefore, it is conclusion that time of the cognitive task interferes in the reaction time due to the mental fatigue caused by the cognitive task of sustained attention.

Mental fatigue in soccer: a systematic review / Fadiga mental no futebol: uma revisão sistemática / Fatiga mental en el fútbol: una revisión sistemática

ABSTRACT Fatigue in soccer players is traditionally investigated based on neuromuscular and metabolic factors. However, given that soccer is one of the sports that has the highest cognitive demand, it is believed that players' performance might also be influenced by the high levels of attention, and frequent decision-making required in soccer. This systematic review aimed to verify the effects of mental fatigue on physical, technical, tactical and cognitive performance of soccer players. We searched in the electronic databases Pubmed, Web of Science and Scopus, for articles published up to 30 April 2018. We included articles that used a protocol of mental fatigue through cognitive tasks performed prior to a physical or cognitive task related to soccer. Only studies that presented an experimental design with the control condition (without mental fatigue) and the experimental condition (with mental fatigue) were selected. A total of six articles met the inclusion criteria, one study by backward reference search and other through the authors' indication. The results showed smaller distances covered in physical tests, while the effects of mental fatigue on physical performance in small-sided games were not clear. In technical tests, there were more penalties in passes and less accuracy and speed when kicking the ball when players were in conditions of mental fatigue. Regarding the tactical variables, it was found that mental fatigue had a detrimental effect on the synchronization between team players and on individual tactical performance in defensive actions. In cognitive tests, based on video recordings of game play, negative effects on the players' speed and accuracy of decision-making were observed. According to the results of the literature search, it can be inferred that mental fatigue is a factor that has a negative influence on soccer performance. Level of evidence II; Systematic review.

RESUMO No futebol, a fadiga é tradicionalmente investigada sob uma perspectiva neuromuscular e metabólica. Entretanto, já que o futebol é uma das modalidades esportivas com maior demanda cognitiva, acredita-se que a exigência de elevados níveis atencionais e as frequentes tomadas de decisões sejam fatores que influenciem o desempenho dos jogadores de futebol. Sendo assim, o objetivo do presente estudo foi verificar, através de uma revisão sistemática, os efeitos da fadiga mental sobre o desempenho físico, técnico, tático e cognitivo dos jogadores de futebol. Foram realizadas buscas nas bases de dados eletrônicas Pubmed, Web of Science e Scopus até 30 de abril de 2018. Incluiram-se artigos que utilizaram um protocolo de fadiga mental através das tarefas cognitivas realizadas previamente a uma tarefa física ou cognitiva relacionada ao futebol. Somente foram selecionados estudos que apresentaram um desenho experimental com a condição controle (sem fadiga mental) e experimental (com fadiga mental). No total, foram selecionados seis estudos que atenderam aos critérios estabelecidos, um estudo por busca reversa e outro por indicação dos autores. Os resultados indicaram menores distâncias percorridas em testes físicos, enquanto que os efeitos da fadiga mental sobre o desempenho físico em jogos reduzidos não foram evidentes. Em testes técnicos, houve maior número de penalizações em passes e menor precisão e velocidade da bola nos chutes na condição de fadiga mental. Em relação às variáveis táticas, foram encontrados efeitos prejudiciais da fadiga mental sobre a sincronização entre os jogadores das equipes e o desempenho tático individual em ações defensivas. Em testes cognitivos, também foram verificados efeitos negativos sobre o tempo e a precisão para a tomada de decisão dos jogadores em testes de vídeo. A partir dos resultados dos estudos analisados, torna-se possível inferir que a fadiga mental é um fator que influencia negativamente o desempenho dos jogadores de futebol. Nível de evidência II; Revisão sistemática.

RESUMEN En el fútbol, la fatiga es tradicionalmente investigada desde una perspectiva neuromuscular y metabólica. Entretanto, ya que el f'útbol es una de las modalidades deportivas con mayor demanda cognitiva, se cree que la exigencia de elevados niveles de atención y las frecuentes tomas de decisión sean factores que influencien el desempeño de los jugadores de fútbol. Siendo así, el objetivo del presente estudio fue verificar, a través de una revisión sistemática, los efectos de la fatiga mental sobre el desempeño físico, técnico, táctico y cognitivo de los jugadores de fútbol. Fueron realizadas búsquedas en las bases de datos electrónicas Pubmed, Web of Science y Scopus hasta 30 de abril de 2018. Se incluyeron artículos que utilizaron un protocolo de fatiga mental a través de las tareas cognitivas realizadas previamente a una tarea física o cognitiva relacionada al fútbol. Solamente fueron seleccionados estudios que presentaron un diseño experimental con la condición control (sin fatiga mental) y experimental (con fatiga mental). En total, fueron seleccionados seis estudios que atendieron los criterios establecidos, un estudio por búsqueda reversa y otro por indicación de los autores. Los resultados indicaron menores distancias recorridas en tests físicos, mientras que los efectos de la fatiga mental sobre el desempeño físico en partidos reducidos no fueron evidentes. En tests técnicos, hubo mayor número de penalizaciones en pases y menor precisión y velocidad de la pelota en los tiros en la condición de fatiga mental. Con relación a las variables tácticas, fueron encontrados efectos perjudiciales de la fatiga mental sobre la sincronización entre los jugadores de los equipos y el desempeño táctico individual en acciones defensivas. En tests cognitivos, también fueron verificados efectos negativos sobre el tiempo y la precisión para la toma de decisión de los jugadores en tests de vídeo. A partir de los resultados de los estudios analizados, se hace posible inferir que la fatiga mental es un factor que influencia negativamente el desempeño de los jugadores de fútbol. Nivel de evidencia II; Revisión sistemática.

The effect of smartphones and playing video games on decision-making in soccer players: A crossover and randomised study.

The objective of this study was to analyse the effect of the use of social networks in smartphones or playing video games on the passing decision-making performance in professional soccer athletes. Participants were 25 male professional soccer athletes (mean ± SD: age 23.4 ± 2.8 years). The participants performed three randomised conditions divided into three groups: control (CON), smartphone (SMA), and video game (VID). Before and after each experimental condition, the Stroop Task assessed the level of induced mental fatigue. Then, the athletes performed a simulated soccer match. A CANON® camera recorded the matches for further analysis on passing decision-making performance. A group effect was identified (p < .01) with impairment on passing decision-making performance for the SMA (p = .01, ES = 0.5) and VID (p = .01, ES = 0.5) conditions. We concluded that the use of social networks on smartphones and/or playing video games right before official soccer matches might impair the passing decision-making performance in professional soccer athletes.

Carga mental en personal de enfermería: Una revisión integradora / Mental workload in nursing staff: An integrative review / Carga de trabalho mental no pessoal de enfermagem: uma revisão integrativa

Introducción: Los profesionales de enfermería están expuestos constantemente a situaciones que generan carga como consecuencia del esfuerzo físico, mental, emocional y económico del cuidado. Objetivo: Identificar a través de la literatura científica el concepto de "Carga Mental en enfermeras", los instrumentos de medición y las estrategias para mitigarla o prevenirla. Metodología: Se realizó una revisión integradora de literatura durante los años 2017 a 2019 sobre artículos publicados desde el año 2000. Se utilizaron las palabras clave DeCS en Español, Inglés y Portugués de: Carga de Trabajo-Workload-Carga de Trabalho, Fatiga Mental- Mental Fatigue- Fadiga Mental, Atención a la Salud Mental-Mental Health Assistance- Assistência à Saùde Mental, Enfermeras-Nurses-Enfermeiras. Las bases de datos consultadas fueron: ProQuest, Scielo, ScienceDirect, Ovid Nursing, Wiley Online Library, EBSCO, ClinicalKey, PubMed, SCOPUS. Se analizaron 39 artículos que cumplieron con los criterios de inclusión. Resultados: Las categorías de análisis fueron: Concepto de carga mental, instrumentos de medición de carga mental en enfermeras y estrategias para mitigarla o prevenirla. Conclusiones: La carga mental es un constructo complejo sin consenso en su definición, incluye varias dimensiones, implica realizar mediciones e intervenciones cognitivas de la función mental, estrés, asertividad y percepción. Se valora a través de medidas fisiológicas de rendimiento y subjetivas. Las últimas han sido las más utilizadas aplicando el método NASA TLX. Las estrategias para mitigarla son: Uso de tecnologías, potenciación de capacidades individuales, justicia distributiva y comunicación asertiva.

Introduction: Nursing professionals are constantly exposed to situations that generate burden as a consequence of the physical, mental, emotional and economic effort of care. Objective: To identify through the scientific literature the concept of "Mental Burden in nurses", the measurement instruments and the strategies to mitigate or prevent it. Methodology: An integrative literature review was carried out during the years 2017 to 2019 on articles published since 2000. The DeCS keywords in Spanish, English and Portuguese were used: Workload-Workload-Workload, Mental Fatigue- Mental Fatigue- Fadiga Mental, Attention to Mental Health-Mental Health Assistance- Assistência à Saùde Mental, Nurses-Nurses-Diseases. The databases consulted were: ProQuest, Scielo, ScienceDirect, Ovid Nursing, Wiley Online Library, EBSCO, ClinicalKey, PubMed, SCOPUS. 39 articles that met the inclusion criteria were analyzed. Results: The categories of analysis were: Concept of mental load, instruments for measuring mental load in nurses and strategies to mitigate or prevent it. Conclusions: The mental load is a complex construct without consensus in its definition, it includes several dimensions, it implies carrying out measurements and cognitive interventions of mental function, stress, assertiveness and perception. It is assessed through subjective and physiological performance measures. The last ones have been the most used applying the NASA TLX method. The strategies to mitigate it are: use of technologies, empowerment of individual capacities, distributive justice and assertive communication.

Introdução: Os profissionais de enfermagem estão constantemente expostos a situações que geram carga em consequência do esforço físico, mental, emocional e econômico do cuidado. Objetivo: Identificar, através da literatura científica, o conceito de "Carga Mental no enfermeiro", os instrumentos de medida e as estratégias para mitigá-lo ou preveni-lo. Metodologia: Foi realizada uma revisão integrativa da literatura durante os anos de 2017 a 2019 em artigos publicados desde 2000. As palavras-chave DeCS em espanhol, inglês e português de: Carga de trabalho-Carga de trabalho-Carga de trabalho, Fadiga mental- Fadiga Mental - Fadiga Mental, Assistência à Saúde Mental - Assistência em Saúde Mental - Assistência à Saúde Mental, Enfermeiros-Enfermeiros-Doenças. Os bancos de dados consultados foram: ProQuest, Scielo, ScienceDirect, Ovid Nursing, Wiley Online Library, EBSCO, ClinicalKey, PubMed, SCOPUS. Foram analisados 39 artigos que atenderam aos critérios de inclusão. Resultados: As categorias de análise foram: conceito de carga mental, instrumentos para medir a carga mental em enfermeiros e estratégias para mitigá-la ou preveni-la. Conclusões: A carga mental é um construto complexo, sem consenso em sua definição, inclui várias dimensões, envolve a realização de medidas cognitivas e intervenções da função mental, estresse, assertividade e percepção. É avaliado através de desempenho fisiológico e medidas subjetivas. Estes últimos foram os mais amplamente utilizados aplicando o método TLX da NASA. As estratégias para mitigá-lo são: uso de tecnologias, fortalecimento de capacidades individuais, justiça distributiva e comunicação assertiva.

Body fat, but not muscle quality, is related to perceived fatigue in young-adult active and inactive women / Gordura corporal, mas não a qualidade muscular, é relacionada a fadiga percebida em mulheres adultas jovens ativas e inativas

Abstract The purpose of this study was to investigate the association of perceived fatigue with body composition and muscle quality (strength, thickness and specific torque) in young adult women. Fifty-one healthy women (31.98 ± 6.88 years) were assessed regarding perceived fatigue, body composition, knee extensors muscle strength, muscle thickness, and muscle quality. The short version of International Physical Activity Questionnaire was applied to classify subjects as active or inactive. To examine the relationship between perceived fatigue and dependent variables, the Pearson's correlation was performed. Perceived fatigue was significantly correlated (p < 0.05) with body weight (r = 0.469), body mass index (r = 0.369), fat mass (r = 0.469), percent body fat (r = 0.396), and relative peak torque (r = -0.378). Additionally, inactive women had significantly greater (p < 0.05) body weight, body mass index, fat mass, percent body fat, and perceived fatigue than active women. Perceived fatigue is related to body weight and fat mass, but not to muscle strength or muscle quality. Moreover, physically active women showed lower perceived fatigue, body weight, and body fat compared to physically inactive women. These results suggest that body fat may play a role in perceived fatigue and physical activity could attenuate such symptom.

Resumo O objetivo deste estudo foi investigar a associação da fadiga percebida com a composição corporal e a qualidade muscular (força, espessura e torque específico) em mulheres adultas jovens. Cinquenta e uma mulheres foram avaliadas quanto a fadiga percebida, a composição corporal, a força muscular de extensão de joelho, a espessura muscular e a qualidade muscular. A versão curta do Questionário Internacional de Atividade Física foi aplicada para classificar as voluntárias como ativas ou inativas.Para examinar a relação entre a fadiga percebida e as variáveis dependentes, a correlação de Pearson foi executada. A fadiga percebida apresentou relação significativa (p < 0,05) com o peso corporal (r = 0,469), IMC (r = 0,369), massa gorda (r = 0,469), percentual de gordura (r = 0,396) e pico de torque relativo (r = -0,378). Adicionalmente, mulheres inativas apresentaram maior (p < 0,05) peso corporal, índice de massa corporal, massa gorda, percentual de gordura e fadiga percebida, comparadas com mulheres ativas. A fadiga percebida se relaciona com o peso corporal e com a gordura corporal, mas não com a força muscular ou com a qualidade muscular. Além disso, mulheres fisicamente ativas tem uma menor fadiga percebida, peso corporal e gordura corporal do que mulheres fisicamente inativas. Esses resultados sugerem que a gordura corporal exerce um papel importante na fadiga percebida e que a atividade física pode atenuar esse sintoma.