Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 1 de 1
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Appl Physiol Nutr Metab ; 49(4): 514-525, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-38079618

RESUMO

There is a significant effect of sex and muscle mass on the cardiorespiratory response to the skeletal muscle metaboreflex during isometric exercise. We therefore tested the hypothesis that sex differences would be present when isolated following dynamic exercise. We also tested the hypothesis that single and double leg post-exercise circulatory occlusion (PECO) following heavy exercise would elicit a cardiorespiratory response proportional to the absolute muscle mass. Healthy (24 ± 4 years) males (n = 10) and females (n = 10) completed pulmonary function and an incremental cycle test to exhaustion. Participants completed two randomized, 6 min bouts of intense cycle exercise (84 ± 7% V̇O2peak). One exercise bout was immediately followed by 3 min PECO (220 mmHg) of the legs while the other exercise bout was followed by passive recovery. Males completed an additional session of testing with single leg PECO. The mean arterial pressure during PECO and control was greater in males compared to females (p = 0.004). The was a significant time by condition by sex interaction in the heart rate response to PECO (p = 0.027). There was also a significant condition by sex interaction in the ventilatory response to PECO (p = 0.026). In males, we observed a dose-dependent cardiovascular, but not ventilatory, response to muscle mass occluded (all p < 0.05). Our findings suggest the metaboreflex contribution to cardiorespiratory control during dynamic exercise is greater in males compared to females. The ventilatory response induced by double-leg occlusion but not single-leg occlusion, suggests that the ventilatory influence of the metaboreflex is less sensitive than the cardiovascular response and may be linked to the greater afferent activation induced by double-leg occlusion.


Assuntos
Sistema Cardiovascular , Músculo Esquelético , Feminino , Humanos , Masculino , Pressão Sanguínea/fisiologia , Exercício Físico/fisiologia , Terapia por Exercício , Força da Mão/fisiologia , Frequência Cardíaca/fisiologia , Músculo Esquelético/fisiologia , Reflexo , Adulto Jovem , Adulto
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...