Body composition and functional capacity as determinants of physical activity in middle-aged and older adults: a cross-sectional analysis

Table 2 Associations of body composition and the measures of functional capacity with physical activity

	β	95% CI
Middle-aged women (n = 1158)
Total body mass [kg] ^a	-0.175 ***	[-0.243, -0.107]
Muscle-free mass [kg] ^a	-0.218 ***	[-0.285, -0.152]
Muscle mass [kg] ^a	0.021	[-0.050, 0.093]
Relative muscle mass [%] ^a	0.273 ***	[0.205, 0.340]
Six-minute walking distance [m] ^a	0.284 ***	[0.217, 0.350]
Relative knee extension torque [Nm/kg] ^a	0.220 ***	[0.149, 0.292]
Older women (n = 289)
Total body mass [kg]	-0.322 ***	[-0.431, -0.213]
Muscle-free mass [kg]	-0.364 ***	[-0.472, -0.258]
Muscle mass [kg]	-0.030	[-0.149, 0.087]
Relative muscle mass [%]	0.405 ***	[0.298, 0.512]
Six-minute walking distance [m]	0.510 ***	[0.401, 0.619]
Relative knee extension torque [Nm/kg]	0.444 ***	[0.337, 0.550]
Older men (n = 196)
Total body mass [kg]	-0.195 **	[-0.337, -0.052]
Muscle-free mass [kg]	-0.285 ***	[-0.425, -0.145]
Muscle mass [kg]	0.115	[-0.037, 0.267]
Relative muscle mass [%]	0.410***	[0.266, 0.554]
Six-minute walking distance [m]	0.410***	[0.266, 0.554]
Relative knee extension torque [Nm/kg]	0.328***	[0.188, 0.469]

Multiple imputation was applied in the analyses. The outcome in the models is physical activity as mean amplitude deviation [mg]. All models are adjusted for age. ^a Model is additionally adjusted for menopausal status and occupational physical activity; β, standardized regression coefficient; CI, confidence interval. *** p < 0.001, ** p < 0.01, * p < 0.05

ISSN: 1861-6909