Author(s): Gouveia, Élvio R. ; Gouveia, Bruna R. ; Maia, José A. ; Blimkie, Cameron J. ; Freitas, Duarte L.
Date: 2016
Persistent ID: http://hdl.handle.net/10400.13/2171
Origin: DigitUMa - Repositório da Universidade da Madeira
Subject(s): Lean soft tissue; Lifestyle; Sarcopenia; .; Faculdade de Ciências Sociais
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.
