Table 3.

Associations between physical activity and body composition

Physical activity	Fat [%]	FFM [%]	Muscle [%]	TBW [%]	BMI percentile
% in Sedentary	R = −0.16	R = 0.01	R = 0.00	R = 0.16	R = 0.11
	p = 0.178	p = 0.955	p = 0.978	p = 0.181	p = 0.360
% in Light	R = −0.17	R = − 0.03	R = − 0.03	R = 0.17	R = 0.12
	p = 0.157	p = 0.794	p = 0.811	p = 0.155	p = 0.334
% in Moderate	R = −0.15	R = 0.06	R = 0.06	R = 0.15	R = 0.15
	p = 0.216	p = 0.627	p = 0.617	p = 0.221	p = 0.221
% in Vigorous	R = −0.18	R = 0.02	R = 0.02	R = 0.18	R = 0.03
	p = 0.120	p = 0.889	p = 0.867	p = 0.120	p = 0.797
Total MVPA	R = −0.19	R = 0.08	R = 0.08	R = 0.19	R = −0.24
	p = 0.108	p = 0.527	p = 0.504	p = 0.108	p = 0.039
% in MVPA	R = −0.19	R = 0.04	R = 0.04	R = 0.19	R = 0.05
	p = 0.109	p = 0.743	p = 0.721	p = 0.111	p = 0.701
Average MVPA per day	R = −0.19	R = 0.14	R = 0.14	R = 0.19	R = −0.23
	p = 0.118	p = 0.260	p = 0.247	p = 0.119	p = 0.054
CPM	R = −0.13	R = 0.08	R = 0.08	R = 0.13	R = −0.17
	p = 0.269	p = 0.506	p = 0.495	p = 0.261	p = 0.148
Steps Counts	R = −0.13	R = 0.07	R = 0.08	R = 0.14	R = −0.20
	p = 0.263	p = 0.554	p = 0.521	p = 0.252	p = 0.094

BMI body mass index, CPM counts per minute, FFM free fat mass, MVPA moderate-to-vigorous physical activity, R the result of the Spearman rank correlation test, TBW total body water