Skeletal muscle and physical activity in Portuguese community-dwelling older adults

Gouveia, Élvio R.; Gouveia, Bruna R.; Maia, José A.; Blimkie, Cameron J.; Freitas, Duarte L.

http://hdl.handle.net/10400.13/2171

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Abstract(s)

The aims of this study were to describe age- and sex-related differences in total body skeletal muscle (TB-SM) mass and to determine the variance explained by physical activity (PA). This cross-sectional study included 401 males and 402 females, aged 60-79 years. TB-SM was determined by dual-energy x-ray absorptiometry (DXA) and PA by Baecke questionnaire. Statistical analysis included t test, ANOVAs, Pearson correlations, and multiple regression analysis. TB-SM mass was higher in the youngest age group when compared with the oldest in males and females. Males had greater TB-SM values than females. PA made a significant and positive contribution to the variation in TB-SM P = 0.071 \ p — .016. Sex, height, fat mass, and PA explained 77% of the variance in TB-SM. The oldest cohorts and females had lower TB-SM than the younger cohorts and males. This study suggests that PA exerts a significant role in the explanation of TB-SM.

Keywords

Lean soft tissue Lifestyle Sarcopenia . Faculdade de Ciências Sociais

URI

http://hdl.handle.net/10400.13/2171

Citation

Gouveia, É. R., Gouveia, B. R., Maia, J. A., Blimkie, C. J., & Freitas, D. L. (2016). Skeletal muscle and physical activity in Portuguese community-dwelling older adults. Journal of aging and physical activity, 24(4), 567-574.