Muscularity in adult humans: proportion of adipose tissue-free body mass as skeletal muscle.

摘要: Muscularity, or the proportion of adipose tissue-free body mass (ATFM) as skeletal muscle (SM), provides valuable composition information, especially for age-related SM loss (i.e., sarcopenia). Limited data from elderly cadavers suggest a relatively constant SM/ATFM ratio, 0.540 +/- 0.046 men (mean SD, n = 6) and 0.489 0.049 women (n 7). The aim present study was to examine magnitude constancy ratio in healthy adults. Whole-body ATFM were measured using multi-scan magnetic resonance imaging. 0.528 0.036 139) 0.473 0.037 165). Multiple regression analysis indicated that significantly influenced by sex, age, weight, race. four factors explained 50% observed between individual variation ratio. After adjusting race, had larger than women. Both older lower younger subjects, although relative reduction greater men. adjustment there no significant differences ratios Asian, Caucasian, Hispanic subjects. In contrast, African-American subjects other three groups. addition, AIDS patients corresponding values