Atividade muscular do antebraço e perfil de preensão manual entre idosas fisicamente ativas e sedentárias
Resumo
Introdução: O processo de envelhecimento promove alterações na musculatura esquelética que influenciam na força muscular e na fadiga, porém o exercício físico tem efeito direto no processo de envelhecimento. Objetivo: O objetivo deste estudo foi investigar a força e a fadigabilidade da força e as atividades musculares do antebraço de preensão manual de idosas de acordo com o nível de atividade física. Método: Os padrões de força muscular rápida, força máxima e fadigabilidade de 32 idosas durante a força de preensão manual foram avaliados neste estudo transversal. Ambas as mãos foram avaliadas, e a atividade muscular dos flexores e extensores do carpo foi monitorada por eletromiografia simultaneamente. Os voluntários foram agrupados em dois grupos com base no seu nível de atividade física. Os resultados foram comparados por fatores de grupo e tempo. Resultados: A força muscular rápida e a força isométrica máxima foram substancialmente maiores no grupo ativo. A perda de força foi verificada no grupo ativo enquanto a fadiga por atividade muscular foi identificada no grupo inativo. Discussão: O padrão de atividade física dos voluntários foi capaz de alterar suas estratégias de contração muscular. O grupo ativo pratica principalmente treino de força ou treino combinado que inclui treino de força com pelo menos 3 sessões por semana. Este volume também foi suficiente para promover ganhos de força e força rápida. Conclusão: O perfil de atividade física das idosas deste estudo influenciou a força, a fatigabilidade e a atividade muscular durante a força de preensão manual.
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