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1.
Nutr. hosp ; 41(2): 426-432, Mar-Abr. 2024. ilus, tab, graf
Article in English | IBECS | ID: ibc-232659

ABSTRACT

Background: the COVID-19 pandemic has impacted people’s behaviors and mental health around the world. Aim: to verify the mediating role of physical activity (PA) level in the relationship between body mass index (BMI) and anxiety and depression symptoms in adults during the COVID-19 pandemic. Methods: this is a cross-sectional study with Brazilian adults aged ≥ 18 years (N = 2000, 59.6 % women) selected by the nonprobabilistic snowball method through digital means of communication (WhatsApp®, Telegram®, Facebook®, Twitter®, e-mails). Linear regression models were fitted for PA level mediation analyses in the relationship between BMI and anxiety/depression symptoms. Results: significant differences were found between the active/not overweight group and the other three groups (active/overweight, insufficiently active/not overweight and insufficiently active/overweight [p < 0.001]) for anxiety/depression after adjusting for age, sex, chronic diseases, alcohol consumption, and smoking. When testing the mediating role of daily PA in the association between BMI and anxiety/depression symptoms, BMI was negatively associated with daily PA in the first regression equation (p < 0.001); in the second, BMI was positively related to anxiety/depression symptoms (p < 0.001); and in the third, daily PA showed an inverse relationship with anxiety/depression symptoms (p < 0.001), and although BMI remained negatively associated with anxiety/depression symptoms, these associations maintained their statistical significance. Conclusions: the results suggest that the effect of BMI on anxiety and depression was partially mediated by daily PA.(AU)


Introducción: la pandemia de covid-19 ha afectado el comportamiento y la salud mental de las personas en todo el mundo. Objetivo: verificar la mediación del nivel de actividad física (af) en la relación entre el índice de masa corporal (imc) y los síntomas de ansiedad y depresión en adultos durante la pandemia covid-19. Métodos: estudio transversal, con adultos brasileños con edad ≥ 18 años (n = 2.000, 59,6 % mujeres), seleccionados por el método no probabilístico de bola de nieve, a través de medios de comunicación digitales (whatsapp®, telegram®, facebook®, twitter®, correos electrónicos).se ajustaron modelos de regresión lineal para los análisis de la mediación del nivel de actividad física en la relación entre el imc y los síntomas de ansiedad/depresión. Resultados: se encontraron diferencias significativas entre el grupo activo/sin exceso de peso y los otros tres grupos (activo/con exceso de peso, insuficientemente activo/sin exceso de peso e insuficientemente activo/con exceso de peso [p < 0,001]) para ansiedad/depresión después de ajustar por edad, sexo, enfermedades, consumo de alcohol y tabaquismo. al probar el papel mediador de la af diaria en la asociación entre el imc y los síntomas de ansiedad/depresión, en la primera ecuación de regresión, el imc se asoció negativamente con la af diaria (p < 0,001); en la segunda, el imc se relacionó positivamente con los síntomas de ansiedad/depresión (p < 0,001); y en la tercera, la af diaria mostró una relación inversa con los síntomas de ansiedad/depresión (p < 0,001), y aunque el imc mantuvo una asociación negativa con dichos síntomas, estas asociaciones conservaron su significación estadística. Conclusiones: los resultados sugieren que el efecto del imc sobre la ansiedad y la depresión estuvo parcialmente mediado por la actividad física diaria.


Subject(s)
Humans , Male , Female , /psychology , Anxiety , Exercise , Depression , Mental Health , Feeding Behavior , /epidemiology , Brazil , Nutritional Sciences , Cross-Sectional Studies
2.
Nutr Hosp ; 2023 Oct 18.
Article in English | MEDLINE | ID: mdl-37929832

ABSTRACT

BACKGROUND: the COVID-19 pandemic has impacted people's behaviors and mental health around the world. AIM: to verify the mediating role of physical activity (PA) level in the relationship between body mass index (BMI) and anxiety and depression symptoms. METHODS: this is a cross-sectional study with Brazilian adults aged ≥ 18 years (n = 2,000, 59.6 % women) selected by the nonprobabilistic snowball method through digital means of communication (WhatsApp®, Telegram®, Facebook®, Twitter®, e-mails). Linear regression models were fitted for PA level mediation analyses in the relationship between BMI and anxiety/depression symptoms. RESULTS: significant differences were found between the active/not overweight group and the other three groups (active/overweight, insufficiently active/not overweight and insufficiently active/overweight [p < 0.001]) for anxiety/depression after adjusting for age, gender, chronic diseases, alcohol consumption, and smoking. When testing the mediating role of daily PA in the association between BMI and anxiety/depression symptoms, BMI was negatively associated with daily PA in the first regression equation (p < 0.001); in the second, BMI was positively related to anxiety/depression symptoms (p < 0.001); and in the third, daily PA showed an inverse relationship with anxiety/depression symptoms (p < 0.001), and although BMI remained negatively associated with anxiety/depression symptoms, these associations maintained their statistical significance. CONCLUSIONS: the results suggest that the effect of BMI on anxiety and depression was partially mediated by daily PA.

3.
Appl Physiol Nutr Metab ; 47(2): 159-164, 2022 Feb.
Article in English | MEDLINE | ID: mdl-34610270

ABSTRACT

It has been shown that the critical speed (CS) predicted from a perceptually self-regulated 10-min submaximal treadmill test (T10) is reliable and closely matches the CS estimated from conventional methods. To assess the relationship between the T10 and 5-km and 10-km running performances, 36 recreational runners (mean SD: age: 32.2 ± 6.2 years, height: 173.2 ± 7.3 cm, weight: 70.9 ± 8.8 kg, maximal oxygen uptake (V̇O2max): 53.3 ± 6.1 mL·kg-1·min-1) performed a ramp incremental test and 2 T10 tests (the first as a familiarization trial). Results showed that the T10 CS (3.9 ± 0.44 m·s-1) was significantly correlated with runners' last 6 months best performances in 5 km (20.3 ± 2.7 min; r = -0.90) and 10 km (42.7 ± 5.7 min; r = -0.91), the V̇O2max (r = 0.75), the speed associated with the gas exchange threshold (vGET: 3.38 ± 0.36 m·s-1; r = 0.76), the speed associated with the second ventilatory threshold (vVT2: 4.15 ± 0.49 m·s-1; r = 0.84), and the speed associated with the V̇O2max (vV̇O2max: 4.78 ± 0.54 m·s-1; r = 0.87). Moreover, 79% and 83% of the variance in 5-km and 10-km performances could be explained solely by the CS predicted from the T10. Results evidenced the strong relationship and practical performance relevance of the T10 CS test. Novelty: Critical speed derived from a 10-min submaximal treadmill test (T10) is significantly correlated with 5-km and 10-km running performances. The T10 critical speed test may represent a useful tool for assessing running performance capabilities.


Subject(s)
Athletic Performance/physiology , Exercise Test/statistics & numerical data , Running/physiology , Walking Speed/physiology , Adult , Female , Humans , Male , Oxygen Consumption , Predictive Value of Tests , Reproducibility of Results
4.
Int J Exerc Sci ; 15(4): 373-385, 2022.
Article in English | MEDLINE | ID: mdl-36895844

ABSTRACT

Obesity induces several disorders, such as android obesity, insulin resistance, and coronary/peripheral artery disease, and obese individuals commonly have low adherence to training programs. Exercise at self-selected intensity is a feasible strategy to avoid dropouts of training routines. We aimed to assess the effects of different training programs at self-selected intensity on body composition, ratings of perceived exertion (RPE), feelings of pleasure and displeasure (FPD) and fitness outcomes (maximum oxygen uptake (VO2max) and maximum dynamic strength (1RM)) in obese women. Forty obese women (n = 40; Body Mass Index: 33.2 ± 1.1 kg.m-2) were randomly allocated to combined training (CT = 10), aerobic training (AT = 10), resistance training (RT = 10) and control group (CG = 10). The frequency that CT, AT and RT performed the training sessions was 3 times per week during 8 weeks. Body composition (DXA), VO2max and 1RM were assessed at baseline and after intervention. All participants were on a restricted dietary intake aiming to ingest 2.650 kcal per day. Post hoc comparisons revealed that CT promotes a larger decrease in body fat percentage (p = 0.001), body fat mass (p = 0.004) than other groups. CT and AT elicited higher V•O2max increases (p = 0.014) than RT and CG, and 1RM values were higher in CT and RT (p = 0.001) than AT and CG at post-intervention. All training groups presented low RPE and high FPD over the training sessions, but only the CT was effective to reduce body fat percentage and body fat mass in obese women. In addition, CT was effective to increase simultaneously maximum oxygen uptake and maximum dynamic strength in obese women.

5.
São Paulo med. j ; 139(4): 325-330, Jul.-Aug. 2021. tab
Article in English | LILACS | ID: biblio-1290250

ABSTRACT

ABSTRACT BACKGROUND: The COVID-19 pandemic may be having many psychological impacts on people, at both an individual and a community level. OBJECTIVE: To ascertain the relationship between the weekly frequency of physical activity and levels of stress among Brazilian adults during social distancing due to the coronavirus (COVID-19), and the interaction of sex in this association. DESIGN AND SETTING: Cross-sectional study with a descriptive approach conducted at a public university in Curitiba (PR), Brazil. METHODS: 2,000 Brazilian adults (average age 36.4 years; 59.6% women) were recruited according to convenience through digital media. They filled out a questionnaire in electronic format that asked for sociodemographic information, health data, food consumption data, weekly frequency of physical activity and stress levels on the 10-item Kessler psychological distress scale. Descriptive statistics and regression analyses were used to evaluate the data. RESULTS: Associations were observed for the following correlations: male sex * no physical activity (odds ratio (OR): 4.35; 95% confidence interval (CI): 1.14-16.67); female sex * physical activity 4 or 5 times a week (OR: 7.86; 95% CI: 2.28-27.05); female sex * physical activity 3 times a week (OR: 7.32; 95% CI: 2.09-25.58); female sex * physical activity 1 or 2 times a week (OR: 14.57; 95% CI: 4.28-49.57); and female sex * no physical activity (OR: 24.17; 95% CI: 7.21-80.97). CONCLUSION: The lower the weekly frequency of physical activity during the period of social distancing was, the greater the chances of having stress levels were, especially for women.


Subject(s)
Humans , Male , Female , Adult , Pandemics , COVID-19 , Brazil/epidemiology , Exercise , Cross-Sectional Studies , Internet , Physical Distancing , SARS-CoV-2
6.
Sao Paulo Med J ; 139(4): 325-330, 2021.
Article in English | MEDLINE | ID: mdl-34190872

ABSTRACT

BACKGROUND: The COVID-19 pandemic may be having many psychological impacts on people, at both an individual and a community level. OBJECTIVE: To ascertain the relationship between the weekly frequency of physical activity and levels of stress among Brazilian adults during social distancing due to the coronavirus (COVID-19), and the interaction of sex in this association. DESIGN AND SETTING: Cross-sectional study with a descriptive approach conducted at a public university in Curitiba (PR), Brazil. METHODS: 2,000 Brazilian adults (average age 36.4 years; 59.6% women) were recruited according to convenience through digital media. They filled out a questionnaire in electronic format that asked for sociodemographic information, health data, food consumption data, weekly frequency of physical activity and stress levels on the 10-item Kessler psychological distress scale. Descriptive statistics and regression analyses were used to evaluate the data. RESULTS: Associations were observed for the following correlations: male sex * no physical activity (odds ratio (OR): 4.35; 95% confidence interval (CI): 1.14-16.67); female sex * physical activity 4 or 5 times a week (OR: 7.86; 95% CI: 2.28-27.05); female sex * physical activity 3 times a week (OR: 7.32; 95% CI: 2.09-25.58); female sex * physical activity 1 or 2 times a week (OR: 14.57; 95% CI: 4.28-49.57); and female sex * no physical activity (OR: 24.17; 95% CI: 7.21-80.97). CONCLUSION: The lower the weekly frequency of physical activity during the period of social distancing was, the greater the chances of having stress levels were, especially for women.


Subject(s)
COVID-19 , Pandemics , Adult , Brazil/epidemiology , Cross-Sectional Studies , Exercise , Female , Humans , Internet , Male , Physical Distancing , SARS-CoV-2
7.
Rev. bras. ciênc. mov ; 29(1): [1-12], jan.-mar. 2021. tab, ilus
Article in English | LILACS | ID: biblio-1348062

ABSTRACT

Este estudo objetivou comparar a influência do uso de polainas de compressão nas respostas fisiológicas, perceptuais e afetivas durante a corrida em corredores recreacionais. Dez corredores recreacionais (31,5 ± 9,7 anos) participaram deste estudo. Todos os sujeitos completaram três visitas ao laboratório: (a) familiarização e teste incremental até a exaustão (b) duas sessões de exercícios realizadas em dias diferentes. Cada sessão envolveu o mesmo protocolo de exercícios (20 minutos continuamente a uma intensidade de 80% da velocidade máxima da esteira a lcançada no teste incremental até a exaustão), com ou sem o uso de meias de compressão. A Felt Arousal Scale (FAS), Feeling Scale (FS), percepção subjetiva de esforço (PSE), o consumo de oxigênio (VO2) e a frequência cardíaca (FC) foram registradas durante cada sessão experimental. Os resultados não mostraram diferenças entre as condições fisiológicas (% VO2máx: 88,1 ± 8,3 vs 87,1 ± 11,32; % HR: 91,8 ± 2,8 vs 90,8 ± 3,2), e as respostas perceptuais (PSE: 6,4 ± 1,2 vs 6,2 ± 1,4) e afetivas (FS: 0,35 ± 2,4 vs 0,37 ± 2,3; FAS: 4,3 ± 0,7 vs 4,3 ± 1,1) durante cada sessão de exercício. Os resultados do presente estudo indicam que o uso de polainas de compressão não promove benefícios fisiológicos, perceptuais e afetivas durante a corrida em corredores recreacionais.(AU)


This study aimed to compare the influence of wearing compression stockings on physiological, perceptual, and affective respon ses during running in recreational runners. Ten recreational runners (31.5 ± 9.7 years) participated in this study. All subjects completed three visits to the lab: (a) familiarization and incremental test until exhaustion (b) two exercise sessions conducted on different days. Each session involved the same exercise protocol (20 min continuously at an intensity of 80% of the maximum treadmill speed achieved in the incremental test until exhaustion), with or without the use of compression stockings. The Felt Arousal Scale (FAS), Feeling Scale (FS), Rating of Perceived Exertion (RPE), oxygen consumption (VO2), and heart rate (HR) were recorded during each experimental session. Results showed no differ ences between the conditions of physiological (% VO2máx: 88.1 ± 8.3 vs 87.1 ± 11.32; % HR: 91.8 ± 2.8 vs 90.8 ± 3.2), perceptual (RPE: 6.4 ± 1.2 vs 6.2 ± 1.4) and affective (FS: 0.35 ± 2.4 vs 0.37 ± 2.3; FAS: 4.3 ± 0.7 vs 4.3 ± 1.1) responses during each exercise sessio n. The results of the present study suggest that wearing of compression stockings does not promote physiological, perceptual, and affective benefits during running of recreational runners.(AU)


Subject(s)
Humans , Male , Adult , Middle Aged , Young Adult , Oxygen Consumption/physiology , Running/physiology , Affect , Physical Exertion/physiology , Stockings, Compression , Heart Rate/physiology
8.
J Sports Sci ; 39(8): 835-844, 2021 Apr.
Article in English | MEDLINE | ID: mdl-33190620

ABSTRACT

We assessed the reliability and validity of a 10-min submaximal treadmill test (T10) to predict critical speed (CS). Forty-two runners completed a familiarization trial plus two experimental trials (T10 test and T10 retest). Reliability between the T10 test and T10 retest was assessed using coefficient of variation (CoV), limits of agreement (LoA) and intraclass correlation (ICC). For validity, the speed from the T10 retest was compared with the CS determined from 3 runs on separate days on a running track over 1200, 2400, and 3600 m (field test). Reliability between the T10 test and T10 retest showed a CoV of 3.4%, LoA of 0.05 ± 0.39 m.s-1, and an ICC of 0.93. Validity showed that speed (m.s-1) (T10 retest: 3.86 ± 0.51; field test: 3.88 ± 0.55) did not differ between trials. The T10 retest was highly correlated with the field test, r = 0.93, and the standard error for the estimate of CS using the T10 retest was 0.06 m.s-1, and the LoA was 0.02 ± 0.40 m.s-1. A submaximal 10-min treadmill test (T10) provides a practical and accessible method to estimate CS.


Subject(s)
Exercise Test , Running/physiology , Adult , Female , Humans , Male , Oxygen Consumption , Reproducibility of Results
9.
Rev. bras. med. esporte ; 26(5): 410-414, Sept.-Oct. 2020. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1137929

ABSTRACT

ABSTRACT Introduction: Road running has been increasing dramatically in Brazil and worldwide for years. However, research into this practice has privileged high performance athletes while neglecting recreational runners, even though they constitute a significant majority of participants. Objectives: This study analyzed the associations between demographic and training characteristics of recreational runners in 5 km, 10 km and half marathon events, and the occurrence of musculoskeletal injuries. Methods: The study used data from 395 adult runners (229 men and 166 women, respectively aged 37.9 ± 9.5 and 37.1 ± 8.7 years, body weight 77 ± 10.5 and 61 ± 9 kg, and height 1.75 ± 0.07 m and 1.62 ± 0.07 m), who voluntarily and anonymously answered a questionnaire available on the Internet. Results: Plantar fasciitis, chondromalacia patellae (runner's knee) and tibial periostitis were the most frequently mentioned injuries in both sexes. Predisposing factors for injury (longer running time, average weekly mileage, maximum mileage and average speed in a workout) predominated in the male group, which had more types of injury and longer layoffs for this reason. Most respondents (63.3% men and 60.2% women) did not perform isolated stretching exercises; in those who did perform these exercises, and in those who stretched before and/or after training for races or competitions, there was no reduction in the incidence of injuries. Conclusion: Men showed a tendency towards greater intensity and volume of race training, in addition to longer running time, which are predisposing factors for injury. This may explain the greater number of different injuries reported in the male group, as well as the longer layoff periods. Level of evidence II; Prognostic studies - Investigating the effect of patient characteristics on disease outcome.


RESUMO Introdução: Há anos a corrida de rua vem crescendo vertiginosamente no Brasil e no mundo. Entretanto, as pesquisas sobre essa prática têm privilegiado os atletas de alto rendimento, deixando os corredores recreacionais em segundo plano, embora eles sejam a expressiva maioria dos praticantes. Objetivos: Este estudo analisou as associações de características demográficas e de treino de corredores recreacionais em provas de 5 km, 10 km e meia maratona à ocorrência de lesões osteomioarticulares. Métodos: Foram utilizados dados de 395 corredores adultos (229 homens e 166 mulheres, com idade 37,9 ± 9,5 e 37,1 ± 8,7 anos; peso corporal 77 ± 10,5 e 61 ± 9 kg e estatura 1,75 ± 0,07 m e 1,62 ± 0,07 m, respectivamente) que responderam, voluntária e anonimamente, a questionário disponibilizado na web. Resultados: Fasciíte plantar, condromalácia patelar e periostite tibial foram as lesões mais citadas, em ambos os sexos. Os fatores predisponentes de lesão (maior tempo de prática, quilometragem média semanal, quilometragem máxima e velocidade média num treino) predominaram no grupo masculino, que mostrou ocorrência de mais tipos de lesão e de períodos maiores de afastamento da prática por esse motivo. A maioria dos pesquisados (63,3% homens e 60,2% mulheres) não fazia treino isolado de alongamento; nos que tinham este hábito e naqueles que se alongavam antes e/ou depois de treinos de corridas ou provas, não houve redução da incidência de lesões. Conclusão: Os homens tinham tendência a maior intensidade e volume de treino de corrida, além de mais tempo de prática, os quais são fatores predisponentes de lesão. Isso pode explicar a maior quantidade de diferentes lesões relatadas no grupo masculino, bem como os maiores períodos de afastamento dos treinos. Nível de evidência II; Estudos prognósticos - Investigação do efeito de característica de um paciente sobre o desfecho da doença.


RESUMEN Introducción: Desde hace años la carrera de calle viene creciendo vertiginosamente, en Brasil y en el mundo. Entretanto, las investigaciones sobre esta práctica han privilegiado a los atletas de alto rendimiento, dejando a los corredores recreativos en segundo plano, aunque ellos sean la mayoría expresiva de los practicantes. Objetivos: Este estudio analizó las asociaciones de características demográficas y de entrenamiento de corredores recreativos en pruebas de 5 km, 10 km y media maratón, con la ocurrencia de lesiones osteomioarticulares. Métodos: Se utilizaron datos de 395 corredores adultos (229 hombres y 166 mujeres, de 37,9 ± 9,5 y 37,1 ± 8,7 años; peso corporal 77 ± 10,5 y 61 ± 9 kg; y estatura 1,75 ± 0,07 m y 1,62 ± 0,07 m, respectivamente), que respondieron, voluntaria y anónimamente, a un cuestionario disponible en la web. Resultados: La fascitis plantar, la condromalacia rotuliana y la periostitis tibial fueron las lesiones más citadas, en ambos sexos. Los factores predisponentes de lesión (mayor tiempo de práctica, kilometraje promedio semanal, kilometraje máximo y velocidad promedio en un entrenamiento) predominaron en el grupo masculino, que mostró la ocurrencia de más tipos de lesión y períodos más largos de alejamiento de la práctica por ese motivo. La mayoría de los encuestados (63,3% hombres y 60,2% mujeres) no realizaba entrenamiento aislado de estiramiento; en aquellos que tenían este hábito y en aquellos que se estiraban antes y/o después de entrenamientos de carrera o pruebas, no hubo reducción de la incidencia de lesiones. Conclusión: Los hombres tenían tendencia a mayor intensidad y volumen de entrenamiento de carrera, además de más tiempo de práctica, los que son factores predisponentes de lesión. Esto puede explicar la mayor cantidad de diferentes lesiones relatadas en el grupo masculino, bien como los mayores períodos de alejamiento de los entrenamientos. Nivel de evidencia II; Estudios pronósticos - Investigación del efecto de característica de un paciente sobre el desenlace de la enfermedad.

10.
Rev. bras. cineantropom. desempenho hum ; 19(6): 696-709, Nov.-Dec. 2017. tab, graf
Article in English | LILACS | ID: biblio-897880

ABSTRACT

Abstract Self-selected intensities during walking and resistances training by obese subjects are below recommended guidelines to improve health-related outcomes. From this perspective, there is the possibility of combining both aerobic and resistance training in a single exercise session with the purpose of increasing training volume and optimizing physiological adaptations, while preserving positive affective responses. Until now, no study has assessed ratings of perceived exertion (RPE) and sensations of pleasure/displeasure (SPD) during a combined training session in obese women. The present study aimed to: (1) assess RPE and SPD during a combined training session in obese women; and (2) compare RPE and SPD responses during different resistance training exercises. Twelve sedentary obese women (age: 39.2 ±11.1 years; height: 160.4 ± 5.9 cm; body mass: 87.4 ± 5.8 kg; BMI: 33.6 ±1.2 kg.m-2) performed a combined aerobic and resistance training session. RPE and SPD were recorded during the session. Data were analyzed with One-way repeated measures ANOVA and Bonferroni's post hoc tests. The results revealed that, despite the increase in exercise volume, RPE responses were low and affective responses were positive. There were no significant differences in RPE and SPD values among resistance exercises. Combined aerobic and resistance training can be prescribed during the initial phase of a training program because it produces low perceived exertion and positive affective responses.


Resumo As intensidades autosselecionadas observadas tanto na caminhada como no treinamento resistido em obesos são inferiores as recomendações do ACSM, (2011) as quais, promovem melhora na aptidão cardiorrespiratória e força muscular. A partir disso, surge a hipótese de combinar os exercícios, aeróbio e resistido em uma única sessão com o intuito de aumentar o volume de treinamento otimizando os ajustes fisiológicos tentando preservar baixos níveis de percepção subjetiva do esforço (PSE) e sensações prazerosas (SPD) observadas nessa intensidade. Desta maneira, o presente estudo teve três objetivos: 1) verificar ao longo de uma sessão de treinamento combinado a PSE e a SPD em mulheres obesas; 2) analisar se ocorrerá alteração na PSE e SPD entre os diferentes exercícios resistidos; 3) investigar se existe correlação entre a PSE e SPD. Participaram doze mulheres obesas não praticantes de exercício físico com idades de 39.2±11.1 anos e IMC: 33.6±1.2 kg.m-2 as quais, foram submetidas a uma sessão de treinamento combinado com duração total de 60 minutos. Ao longo da sessão foram reportadas a PSE e SPD. Para analisar os dados foi utilizado uma ANOVA de medidas repetidas seguido de um Post Hock de Bonferroni. Os resultados demonstram que o volume aumentado produziu baixos valores de PSE (~3) e sensações prazerosas (~3) ao longo da sessão. Não foi encontrado diferença significativa da PSE e SPD entre os exercícios resistidos e foi evidenciada uma relação negativa moderada significativa (r= -0.624; p= 0.001 com 95% IC: -0.710; -0.280) entre a PSE e SPD. Sendo assim, o treinamento combinado pode ser prescrito para mulheres obesas, pois, produz baixa percepção de esforço e sensações prazerosas.


Subject(s)
Humans , Female , Adult , Exercise/psychology , Affect/physiology , Obesity , Perception/physiology , Physical Exertion/physiology , Pleasure
11.
Int J Exerc Sci ; 9(4): 536-544, 2016.
Article in English | MEDLINE | ID: mdl-27990220

ABSTRACT

This study investigated the influence of music on the rating of perceived exertion (RPE) and attentional focus during walking at a self-selected pace. Fifteen overweight and obese women volunteered to participate in the study. They underwent four sessions: the first for incremental maximal test and anthropometric measurement followed by three experimental sessions. After the first session, they were exposed to three 30-minute walking sessions at a self-selected pace in a counterbalanced order: fast-tempo music (FT), medium-tempo music (MT) and no-music control (NM). Borg's RPE Scale and an Attentional Focus Questionnaire were used to measure the perceptual response and attentional focus, respectively. Results showed that the RPE was higher in the no-music control than in the medium-tempo music (12.05 ± 0.6 vs. 10.5 ± 0.5). Furthermore, dissociative attentional focus was greater for both conditions with music in comparison with the no-music control (NM= 39.0 ± 4.1; MT= 48.4 ± 4.1 and FT= 47.9 ± 4.5). The results indicated that the use of music during walking can modulate attentional focus, increasing dissociative thought, and medium-tempo music can reduce the RPE.

12.
Rev. bras. med. esporte ; 21(3): 200-205, May-Jun/2015. tab
Article in Portuguese | LILACS | ID: lil-752052

ABSTRACT

INTRODUÇÃO: Sensações de prazer/desprazer são moduladas de acordo com as intensidades prescritas para o exercício, demonstrando uma relação simples, onde quanto mais intenso o estímulo, maior o esforço percebido. OBJETIVO: Verificar as diferenças entre as respostas perceptuais e afetivas agudas em diferentes intensidades de exercícios com pesos em mulheres idosas. MÉTODOS: Quatorze mulheres com idade entre 65 e 75 anos, previamente sedentárias, com sobrepeso, foram submetidas a três diferentes intensidades de treinamento com pesos: 35% e 70% de 1RM, e autosselecionada. Foram avaliados o afeto e a percepção subjetiva do esforço (PSE). Após 30 minutos do término da sessão, foi avaliada a percepção subjetiva do esforço da sessão (PSE-S). Foi utilizado o teste de variância One-way ANOVA de um fator de medidas repetidas para as variáveis dependentes PSE-S, PSE e afeto, seguido de post hock de Tukey. RESULTADOS: A PSE-S demonstrou diferença significativa da testagem (F (7,99) =15,358; p=0,001) entre as intensidades, assim como para PSE entre cada exercício. A PSE-S, para 35% de 1RM, foi menor, quando comparada à PSE-S para 70% de 1RM, e à intensidade autosselecionada. A intensidade de 70% de 1RM, quando comparada com a intensidade autosselecionada, não apresentou diferença significativa. Em relação a PSE nos exercícios, foi observado um esforço significativamente maior (p < 0,001) para 70% de 1RM, quando comparados com a autosseleção da carga. O afeto revelou diferença significativa na intensidade de 35% de 1RM, mostrando uma resposta mais prazerosa, quando comparado à carga de 70% de 1RM, e à autosseleção da carga. CONCLUSÃO: Os resultados demonstraram que baixas intensidades são percebidas como menor esforço e este fato contribuiu para a produção de respostas afetivas mais prazerosas. Além disso, fatores interindividuais são capazes de modular estas respostas, possibilitando a diminuição da percepção do esforço em intensidades mais vigorosas. .


INTRODUCTION: Feelings of pleasure/displeasure are modulated according to prescribed exercise intensities, where the more intense the stimulus, the higher the perception of effort. OBJECTIVE: To investigate the differences between perceptual and affective responses to different intensities of acute resistance training in elderly women. METHODS: Fourteen women aged between 65 and 75 years old, previously sedentary and overweight were subjected to three different intensities of resistance training: 35% and 70% 1-RM, and self-selected. Affect and rate of perceived exertion (RPE) were assessed. Session rate of perceived exertion (RPE-S) was assessed 30 minutes after the conclusion of the session. One way ANOVA test for repeated measures was used for the dependent variables (RPE-S, RPE and affect), followed by Tukey's post hock. RESULTS: RPE-S showed a significant difference (F (7.99) = 15.358; p = 0.001) between the intensities as well as RPE between each exercise. RPE-S of 35% 1-RM was lower when compared to RPE-S for 70% 1-RM, and self-selected intensity. The intensity of 70% 1-RM, compared with the self-selected intensity, showed no significant difference. Regarding RPE during the exercises, significantly more effort (p<0.001) was observed for the 70% 1-RM when compared with the self-selection of the load. The affect revealed a significant difference for the intensity of 35% 1-RM, showing a more pleasant response when compared to the load of 70% 1-RM, and self-selection of the load. CONCLUSION: Results showed that low intensities are perceived as less effort and this fact contributed to the production of more pleasurable affective responses. Moreover, inter-individual factors between subjects can modulate these responses, enabling the reduction of perceived exertion in more vigorous intensities. .


INTRODUCCIÓN: Los sensaciones de placer/desplacer son moduladas de acuerdo con las intensidades prescritas para el ejercicio, demostrando una relación simple, en donde cuanto más intenso es el estímulo, mayor será el esfuerzo percibido. OBJETIVO: Verificar las diferencias entre las respuestas perceptuales y afectivas agudas en diferentes intensidades de ejercicio en mujeres ancianas. MÉTODOS: Catorce mujeres entre 65 y 75 años, previamente sedentarias, con sobrepeso, fueron sometidas a tres intensidades diferentes de entrenamiento con pesos: 35% y 70% de 1RM, y autoseleccionada. Fueron evaluados el afecto y la percepción subjetiva del esfuerzo (PSE). Después de 30 minutos del término de la sesión, fue evaluada la percepción subjetiva del esfuerzo de la sesión (PSE-S). Se utilizó ANOVA de un factor de medidas repetidas para las variables dependientes PSE-S, PSE y afecto, seguido por post hoc de Tukey. RESULTADOS: La PSE-S demostró diferencia significativa del test (F (7,99) = 15,358, p = 0,001) entre las intensidades, así como para PSE entre cada ejercicio. La PSE-S para 35% de 1RM fue menor, cuando comparada con la PSE-S para 70% de 1RM, e intensidad autoseleccionada. La intensidad de 70% de 1RM, cuando comparada con la intensidad autoseleccionada, no mostró diferencias significativas. En relación a la PSE con los ejercicios, fue observado un esfuerzo significativamente mayor (p <0,001) para 70% de 1RM, cuando comparados con la autoselección de carga. El afecto reveló diferencia significativa en la intensidad de 35% de 1RM, mostrando una respuesta más placentera, cuando comparado con la carga de 70% de 1RM, y autoselección de carga. CONCLUSIÓN: Los resultados demostraron que bajas intensidades son percibidas como menor esfuerzo y este hecho contribuyó para la producción de respuestas afectivas más placenteras. Además, los factores interindividuales son capaces de modular estas respuestas, posibilitando la disminución de la percepción ...

13.
Rev. bras. ciênc. mov ; 21(4): 151-156, 2013.
Article in Portuguese | LILACS | ID: lil-733819

ABSTRACT

O objetivo do presente estudo foi avaliar a percepção subjetiva do esforço (PSE) comparando a PSE-T final em relação a PSE-S, bem como, comparar se a média da PSE-T corresponde a PSE-S. Foram avaliadas 14 mulheres com idade entre 65 a 75 anos suficientemente ativas com um IMC de ≥ 20 kg.m-2 e ≤ 25,0 kg.m-2. As participantes realizaram uma sessão de treinamento com pesos composta por cinco exercícios, (supino reto máquina, cadeira extensora, puxada aberta frontal, mesa flexora e levantamento lateral), sendo executado para cada um deles 3 séries de 8-10 repetições a 70% de 1RM com 1’de intervalo entre as séries. Ao final de cada série foi reportada a PSE-T e ao término da sessão após vinte a trinta minutos de descanso foi obtida a medida da PSE-S. Foi aplicado o teste de Shapiro Wilk, constatando que os dados não apresentavam uma distribuição normal (p<0,05). Portanto, foi utilizado o teste de Wilcoxon com um nível de significância de p < 0,05 sendo comparado os valores de PSE-T obtidos somente na última série do último exercício com os valores de PSE-T obtidos somente na última série do último exercício com os valores de PSE-S pode ser similar a PSE-T ou apresentar alguma relação a qual, não esta clara.


The aim of this study was to evaluate the rating of perceived exertion (RPE) by comparing the final RPE-T to RPE-S, as well as, to verify if the mean RPE-T corresponds to RPE-S. Fourteen active women aged 65 to 75 years with BMI ≥ 20 kg.m-2 and ≤ 25.0 kg.m-2. The participants completed one session of resistance training with five exercises (bench press, leg extension, front lat pull--down, leg curl and lateral rise). For each exercise three 3 sets of 8-10 repetitions at 70% of 1RM were completed with 1 min interval between them. At the end of each set the RPE-T was reported and at the end of the session following twenty to thirty minutes of rest the RPE-S was evaluated. The Shapiro Wilk test was applied, noting that the data did not show a normal distribution (p < .05). Therefore, the Wilcoxon test was used with a significance level of p < .05 to compare the RPE-T and RPE--T and RPE-S values. The same analysis was usedto compare the RPE-T with RPE. The results showed no significant difference between RPE-S and RPE-T, as well as between RPE-T and RPE-S. In conclusion, the RPE-S. In conclusion, the RPE-S can be similar to RPE-T or present a relationship, which is unclear.


Subject(s)
Humans , Female , Aged , Exercise , Health of the Elderly , Physical Education and Training , Physical Exertion , Body Weights and Measures , Population Dynamics , Sports
14.
Acta sci., Health sci ; 34(2): 145-150, jul.-dez. 2012. tab
Article in English | LILACS | ID: biblio-2156

ABSTRACT

The purpose of this study was to compare the energy cost between genders during treadmill walking at self-selected pace; and to verify if the energy cost achieve the values recommended for weight maintenance or loss proposed by the American College of Sports Medicine (ACSM). Seventeen men and seventeen women, mean age of 23.32 ± 3.06 years, undertaken two experimental sessions: (I) anthropometric measurements and a load-incremental maximum test; and, (II) a 20-min walking test at self-selected pace on treadmill. Men showed a greater energy cost than women (146.18 ± 47.66 and 100.86 ± 17.04 kcal, respectively). This difference was maintained after adjust by body weight (2.2 ± 0.5 and 1.7 ± 0.2 kcal kg-1, respectively). The greater energy cost found in men can be explained by the self-selected treadmill speed that lead to a greater O2 in men. However, the exercise intensity selected by both genders did not elicit an effective energy cost that can promote weight maintenance or loss. Nonetheless, if participants performed a longer walking (> 20 minutes), they probably would achieve the energy cost recommended by the ACSM guidelines.


O objetivo do presente estudo foi comparar o gasto energético entre os gêneros durante a caminhada na esteira em ritmo auto-selecionado e verificar se a intensidade que os sujeitos buscam caminhar promove um dispêndio energético dentro do recomendado para a manutenção e/ou redução do peso corporal conforme proposto pelas diretrizes do ACSM. Participaram 17 homens e 17 mulheres com média de idade de 23,32 ± 3,06 anos, submetidos a duas sessões experimentais: (I) avaliação antropométrica e teste incremental máximo, e (II) um teste de 20 minutos de caminhada na esteira em ritmo auto-selecionado. Os homens apresentaram um gasto energético superior ao das mulheres (146,18 ± 47,66 e 100,86 ± 17,04 kcal, respectivamente). Essas diferenças persistiram após correção da massa corporal (2,2 ± 0,5 e 1,7 ± 0,2 kcal kg-1, respectivamente). Pode-se concluir que o maior gasto energético encontrado nos homens, foi decorrente da velocidade de caminhada auto-selecionada, proporcionando um O2 superior. Contudo a intensidade de caminhada selecionada por ambos os gêneros não foi suficiente para propiciar um gasto energético considerado efetivo para manutenção e/ou redução do peso corporal. Entretanto, é possível especular que se a atividade fosse realizda por um periodo mais longo (> 20 minutos), os indivíduos poderiam atingir as diretrizes propostas pelo ACSM.


Subject(s)
Humans , Male , Female , Adult , Women , Exercise , Walking , Energy Metabolism , Men
15.
Rev. educ. fis ; 23(1): 79-85, jan.-mar. 2012. tab
Article in Portuguese | LILACS | ID: lil-701419

ABSTRACT

O objetivo do estudo foi comparar a PSE no limiar ventilatório (LV) entre homens e mulheres. Participaram 17 homens (24,0 ± 3,3 anos) e 17 mulheres (22,5 ± 2,6 anos), submetidos a duas sessões experimentais com intervalo mínimo de 48 horas: (I) avaliação antropométrica e instruções referentes aos procedimentos e (II) teste máximo em esteira. Na análise estatística empregou-se teste t Student para verificar possíveis diferenças entre gêneros (p < 0,05). Não foram verificadas diferenças significativas entre homens e mulheres para a PSE LV (11,1 ± 1,8 e 12,1 ± 1,5, respectivamente). Apesar de as mulheres demonstrarem PSE superior em intensidade de exercício baseada em níveis absolutos, estas diferenças desaparecem quando homens e mulheres são testados em intensidade relativa de exercício. Conclui-se que homens e mulheres apresentam valores de PSE LV entre 12 e 13 ("leve" e "algo difícil") durante teste de esforço máximo.


The purpose of the present study was to compare the rating of perceived exertion (RPE) at ventilatory threshold (VT) during graded treadmill exercise between men and women. Participated 17 men (24.0 ± 3.3 years) and 17 women (22.5 ± 2.6 years) were submitted to two experimental sessions with a minimum interval of 48 hours: (I) anthropometric evaluation and instructions regarding the procedures, and (II) graded treadmill exercise. For statistical analysis, was employed used t Student test to verify possible differences between genders (p > 0.05). There were no significant differences between genders to RPE VT (11.7 ± 1.8 and 12.2 ± 1.5, respectively). Although women had a higher RPE to exercise intensity based on absolute levels, these differences were minimized or disappeared when men and women were compared at similar relative exercise intensity. The result of present study showed that men and women had a similar RPE VT between 12 and 13 ("light" and "something hard") during graded treadmill exercise.

16.
Motriz rev. educ. fís. (Impr.) ; 18(1): 104-112, jan.-mar. 2012. tab
Article in Portuguese | LILACS | ID: lil-645719

ABSTRACT

Muitos profissionais do esporte periodizam o treinamento do futebol e do futsal de forma semelhante. Todavia, pouco se conhece das respostas físicas e fisiológicas dos atletas de futsal. Esse estudo comparou perfil antropométrico, capacidade aeróbia e produção de potência entre atletas profissionais de futsal e futebol. Onze jogadores de futsal (idade 24,1±2,4anos) e 21 jogadores de futebol (idade 22,6±3,6anos) do sexo masculino submeteram-se a duas sessões experimentais: (I) avaliação antropométrica, teste de esforço máximo em esteira e (II) teste de velocidade de 30 metros (capacidade de sprint repetido, CSR). Empregou-se teste t para amostras independentes, permitindo verificar possíveis diferenças entre as modalidades (p<0,05). Comparados aos atletas de futebol, os jogadores de futsal apresentaram, respectivamente, maiores valores de FCLV (177,2±10 e 167,1±10,8 bpm); VO2max, VO2LV e %VO2max (62,5±4,3 e 52,1±4,6; 58,7±5,6 e 43,1±4,6; 93,9±5,3 e 76±8,4 ml∙kg-1∙min-1). Esses resultados demonstram a necessidade de métodos específicos para treinamento do futsal e futebol.Palavras-chave: Futsal. Futebol. Consumo máximo de oxigênio. Potência muscular.


Many professional sports training periodize soccer and futsal similarly. However, little is known about physical and physiological responses of futsal players. This study compared anthropometric, aerobic capacity and power production among professional indoor and outdoor soccer players. Eleven futsal players (age 24.1±2.4 years) and 21 soccer players (age 22.6±3.6 years) males underwent two experimental sessions: (i) anthropometric measurements, maximal effort test treadmill and (II) test speed of 30 meters (repeated sprint ability, CSA). It was applied t-test for independent samples to verify possible differences between the modalities (p>0,05). The futsal players showed higher values of HRVT (177,2±10 e 67,1±10,8 bpm) VO2max ;VO2VT; %VO2max (62,5±4,3 e 52,1±4,6; 58,7±5,6 e 43,1±4,6; 76±8,4 e 93,9±5,3 ml∙kg-1∙min-1) compared with soccer players, respectively. These results demonstrate the need for specific methods of training for outdoor and indoor soccer.


Subject(s)
Humans , Male , Adult , Oxygen Consumption , Athletic Performance/physiology , Muscle Strength/physiology , Soccer/physiology
17.
Article in Portuguese | LILACS-Express | LILACS | ID: lil-574549

ABSTRACT

O objetivo do presente estudo foi analisar o estado nutricional e verificar aassociação do excesso de peso corporal (EPC) com o gênero e a idade em crianças e adolescentes da cidade de Vilhena, Rondônia. Participaram 5883 escolares, sendo crianças (6 a 11 anos) e adolescentes (12 a 17 anos), da rede pública de ensino. Foram mensuradas a massa corporal e estatura, e calculado o índice de massa corporal (IMC) para posteriorclassificação do estado nutricional. Utilizou-se o teste ?t? para comparação entre os gêneros e o teste do qui-quadrado e regressão de Poisson para verificar a associação do EPC com o gênero e a idade. A análise dos dados foi realizada no software SPSS, versão 11.0 e foi adotado nível de significância de p<0,05. A prevalência de EPC foi de 19,3% nas crianças e 17,4% nos adolescentes. Observou-se associação significativa entre EPC com o gênero e a idade entre as crianças, sendo que as meninas apresentaram maior prevalência de EPC (RP=1,81;IC95%=1,49-2,21) do que os meninos. Entre os adolescentes também se verificou que meninas apresentam maiores prevalência de EPC do que os meninos (RP=1,81; IC95%=1,49-2,21). A prevalência de EPC aumentou linearmente entre as crianças (6-11 anos) e diminuiu nos adolescentes (15-17 anos). Esses resultados sugerem que entre crianças e adolescentes do norte brasileiro as prevalências de excesso de peso apresentam-se elevadas.


The aim of this study was to assess the nutritional status and the association of excess body weight (EBW) with gender and age among children and adolescents from the town of Vilhena, Rondonia, Brazil. A total of 5,883 students, including children (6 to 11 years) and adolescents (12 to 17 years), from public schools participated in the study. Body weight and height were measured and the body mass index was calculated for subsequent classification of nutritional status. Thet-test was used for comparison between genders and the chi-square test and Poisson regression were used to evaluate the association between EBW, gender, and age. Data were analyzed with the SPSS 11.0 program at a level of significance of p < 0.05. The prevalence of EBW was 19.3%among children and 17.4% among adolescents. EBW was significantly associated with gender and age among children. In addition, the prevalence of EBW was higher among girls (PR = 1.81, 95% CI 1.49 to 2.21) than among boys. Adolescent girls also presented a higher prevalence of EBW than boys (PR = 1.81, 95% CI 1.49 to 2.21). The prevalence of EBW increased linearly in children (6 to 11 years) and decreased in adolescents (15 to 17 years). These results suggestthat the prevalence of overweight is high among children and adolescents from northern Brazil.

18.
Arch. latinoam. nutr ; 60(4): 340-347, dic. 2010. tab
Article in Portuguese | LILACS | ID: lil-659108

ABSTRACT

A região da Tríplice Fronteira apresenta diversos problemas sociais e de saúde na população jovem, contudo, não há informações sobre a proporção de adolescentes com excesso de peso corporal. Este estudo investigou a prevalência de excesso de peso corporal e os fatores associados em escolares da Tríplice Fronteira: Argentina, Brasil e Paraguai. Participaram do estudo 1.183 escolares, de 15 a 18 anos de idade. O excesso de peso corporal foi identificado segundo os pontos de corte do índice de massa corporal, propostos pela Organização Mundial de Saúde. O questionário do Global School-Based Student Health Survey foi utilizado para identificar fatores sociodemográficos (sexo e faixa etária) e comportamentais (atividade física fora da escola, deslocamento à escola, tempo assistindo TV e consumo de frutas, vegetais, doces e salgados) associados ao excesso de peso corporal. Utilizou-se a estatística descritiva, análise de variância, qui-quadrado e regressão logística binária, adotando-se p< 1 vez/dia) tiveram 2,2 e 2,9 vezes mais chances de ter excesso de peso corporal do que seus pares que realizavam deslocamento ativo e que consumiam vegetais diariamente, respectivamente. Estes resultados sugerem que políticas públicas de combate ao excesso de peso corporal devem focar a promoção hábitos saudáveis entre os jovens da Tríplice Fronteira.


The Tri-Border Region has several social and health problems among young people, however, there are no data about the overweight between adolescents. This study investigated the prevalence of overweight and associated factors in students from Tri-Border Region: Argentina, Brazil and Paraguay. Study participants were 1.183 students, ages from 15 to 18 years. The overweight was identified according to body mass index cut-off points proposed by the World Health Organization. The Global School-Based Student Health Survey questionnaire was used to identify sociodemographic (gender and age) and behavioral factors (physical activity outside of school, commuting to school, time watching TV and fruits, vegetables, sweet, and salty snack consumption) associated with overweight in adolescents. It was used the descriptive statistics, analysis of variance, chi-square and binary logistic regression, adopting p< 1 time/day) were 2,2 and 2,9 times more likely to have overweight than their counterparts who performed active commuting to school and consumed vegetables daily, respectively. These results suggest that public policies to combat overweight should attention on promoting healthy lifestyle among young people from Tri-Border Region.


Subject(s)
Adolescent , Female , Humans , Male , Feeding Behavior , Life Style , Motor Activity , Overweight/epidemiology , Students/statistics & numerical data , Argentina/epidemiology , Body Mass Index , Brazil/epidemiology , Cross-Sectional Studies , Prevalence , Paraguay/epidemiology , Risk Factors
19.
Rev. bras. med. esporte ; 16(5): 329-334, set.-out. 2010. ilus, tab
Article in Portuguese | LILACS | ID: lil-562968

ABSTRACT

Comparar as respostas fisiológicas, perceptuais e afetivas durante caminhada em ritmo autosselecionado por mulheres adultas de três diferentes faixas etárias. Métodos: Foram investigados 66 sujeitos do sexo feminino, previamente sedentários, distribuídos de acordo com a sua idade cronológica nos seguintes grupos: GI (20,0-25,0 anos, n = 22), GII (30,0-35,0 anos, n = 22) e GIII (40,0-45,0 anos, n = 22). Todos os participantes foram submetidos a (i) pré-avaliação médica, avaliação antropométrica e processo de familiarização, (ii) teste incremental máximo em esteira, e (iii) um teste de 20-minutos de caminhada em ritmo autosselecionado em esteira. As respostas fisiológicas (consumo de oxigênio, O2, e frequência cardíaca, FC) foram mensuradas continuamente durante a realização do teste de 20-minutos de caminhada em ritmo autosselecionado. Por sua vez, as respostas perceptuais (percepção subjetiva de esforço, PSE) e afetivas foram determinadas a cada intervalo de cinco minutos do teste. Para a análise estatística, empregou-se uma ANOVA de um fator (faixa etária), adotando-se um valor de p < 0,05. Resultados: Nenhuma diferença significativa foi verificada entre os grupos etários no O2 e na FC durante teste de 20-minutos de caminhada em ritmo autosselecionado. A velocidade de caminhada também foi similar entre os grupos etários. Contudo, as respostas fisiológicas relativas aos valores máximos ( por centoO2Máx e por centoFC Máx) e aos valores no limiar ventilatório (LV, por centoO2LV e por centoFCLV) foram mais elevadas em GIII comparativamente à GI e GII (p < 0,05). Nenhuma diferença foi verificada tanto na PSE como no afeto entre os grupos etários. CONCLUSÃO: As respostas fisiológicas, porém não as respostas perceptuais e afetivas, diferem de acordo com a faixa etária investigada durante realização de caminhada em ritmo autosselecionado por mulheres adultas, previamente sedentárias.


To compare the physiological, perception and affective responses during treadmill walking at a self-selected pace by previously sedentary women from three age groups. Methods: Sixty-six healthy women were assigned into three groups according to their age: GI (20.0-25.0 yr, n = 22), GII (30.0-35.0 yr, n = 22) and GIII (40.0-45.0 yr, n = 22). Each participant performed (i) an initial medical screening, anthropometric assessment and familiarization; (ii) an incremental treadmill test to determine O2max; and (iii) a 20-min treadmill walking bout at a self-selected pace. During the 20-min of treadmill walking at a self-selected pace, the physiological (oxygen uptake, O2 and heart rate, HR) responses were continuously recorded. The perception (Borg-RPE for the overall body, 6-20) and affective (Feeling Scale) responses were measured every 5 min throughout the test. One-way ANOVA was used for statistical analysis (p < 0.05). Results: one-way ANOVA demonstrated that there were not significant differences in O2 and HR during a 20-min treadmill walking bout at a self-selected pace among the three age groups. However, the percent O2Max, percent O2LV, percentFC Max, and percentFCLV were significantly higher in GIII compared with GI and GII (p < 0.05). Finally, the perception and affective responses during a 20-min treadmill walking bout at a self-selected pace were similar among the three age groups. CONCLUSION: These findings demonstrated that the physiological but not the perception and affective responses to treadmill walking at a self-selected pace by sedentary women, did differ according to their age group.


Subject(s)
Humans , Female , Young Adult , Walking/physiology , Oxygen Consumption/physiology , Exercise/physiology , Heart Rate/physiology , Psychophysiology , Aging
20.
RBM rev. bras. med ; 67(7)jul. 2010.
Article in Portuguese | LILACS | ID: lil-553880

ABSTRACT

Nas últimas décadas tem aumentado o interesse científico sobre os efeitos do exercício físico no sistema imunitário. A procura por esta relação tem sido justificada pela importância clínica que esta área representa no auxílio e melhora da função imune de atletas e da população em geral. No entanto, muitas perguntas relativas aos mecanismos pelos quais o exercício influencia na função do sistema imunitário permanece sem resposta. O presente estudo teve como objetivo apresentar, através de pesquisa bibliográfica, os efeitos do exercício físico nos principais componentes do sistema imune, bem como sua ação diante de infecções nas vias aéreas superiores (IVAS). Foram selecionados 38 trabalhos, incluído artigos de revisão e estudos originais, disponíveis na base de dados PubMed/Medline, priorizando a inclusão dos artigos mais recentes e originais. Para localização dos trabalhos se utilizou a combinação das seguintes palavras-chaves: exercise, physical activity, immune system, leukocyte, lymphocytes, neutrophil, macrophage, natural killer cell, cytokines, immunoglobulin e infection, selecionando estudos referentes ao período de 1991 a 2007. A análise da literatura apresentou evidências que o exercício moderado, de intensidade < 60 % do Vo2máx com duração < 60 min, é associado a menores perturbações no sistema imune, enquanto que o exercício vigoroso tem demonstrado características opostas, aumentando o risco de adquirir IVAS. No entanto mais esclarecimentos se fazem necessários para que se estabeleçam os diferentes mecanismos relativos ao papel do exercício físico nas respostas imunitárias.

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