Por Que Mulheres Acima dos 40 Anos Precisam de Treinamento de Resistência Pesado, Não de Cargas Mais Leves
À medida que o estrogênio diminui durante a perimenopausa e além, os sinais de construção muscular nos quais as mulheres antes dependiam enfraquecem significativamente, e a abordagem padrão de pesos leves com muitas repetições pode não fornecer mais um estímulo adequado. De acordo com a Dra. Stacy Sims, o levantamento composto mais pesado é uma das ferramentas com maior respaldo científico disponíveis para preservar a qualidade muscular, a densidade óssea, a saúde metabólica e a função cognitiva nessa fase da vida.
Criado com IAPara muitas mulheres, os conselhos de condicionamento físico absorvidos ao longo de décadas concentram-se em tonificação, queima de calorias e evitar o ganho de volume muscular. Essa estrutura, segundo a fisiologista do exercício Dra. Stacy Sims, é mal adaptada à realidade fisiológica do que acontece com os músculos e os ossos à medida que o estrogênio declina. As mudanças hormonais da perimenopausa e da menopausa alteram em nível fundamental a forma como os músculos respondem ao treinamento, e compreender essa mudança transforma o que um treino produtivo deve ser para mulheres na meia-idade e além.
Criado com IAO Mecanismo Hormonal: O Que o Estrogênio Faz ao Músculo
O estrogênio não é apenas um hormônio reprodutivo. De acordo com a Dra. Sims, ele desempenha um papel direto na forma como os músculos se contraem e se recuperam. Especificamente, o estrogênio regula a miosina, uma das duas proteínas contráteis nas fibras musculares (a outra sendo a actina). Quando o estrogênio oscila e declina, a capacidade da miosina de se ligar à actina e gerar uma contração vigorosa enfraquece. O resultado é uma redução tanto na produção de força quanto na qualidade muscular que é distinta do simples envelhecimento.
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