Table 3. Associations of physical fitness and physical activity with body composition values.

	BMI			FFM			FM
	r2	β	p	r2	β	p	r2	β	p
20 m shuttle run	0.042	-0.204	0.003	0.006	-0.077	0.274	0.048	-0.220	0.001
Model 1	0.048	-0.219	0.015	0.092	-0.119	0.000	0.049	-0.216	0.017
Model 2	0.066	-0.197	0.025	0.113	-0.113	0.001	0.057	-0.187	0.064
4x10 m shuttle run	0.013	0.115	0.087	0.001	-0.033	0.630	0.017	0.132	0.055
Model 1	0.016	0.124	0.324	0.070	0.017	0.002	0.020	0.124	0.246
Model 2	0.042	0.118	0.146	0.092	0.015	0.004	0.035	0.104	0.265
Standing long jump	0.013	-0.176	0.009	0.017	0.129	0.062	0.044	-0.210	0.002
Model 1	0.034	-0.189	0.055	0.071	0.081	0.002	0.045	-0.203	0.023
Model 2	0.057	-0.189	0.047	0.092	0.090	0.004	0.058	-0.191	0.055
Hand grip strength	0.117	0.342	0.000	0.380	0.616	0.000	0.091	0.302	0.000
Model 1	0.119	0.349	0.000	0.398	0.589	0.000	0.111	0.332	0.000
Model2	0.134	0.339	0.000	0.425	0.604	0.000	0.124	0.327	0.000
MVPA	0.000	0.016	0.825	0.050	0.224	0.002	0.000	-0.011	0.881
Model 1	0.005	-0.001	0.782	0.091	0.193	0.000	0.005	-0.005	0.804
Model 2	0.014	-0.004	0.759	0.113	0.217	0.001	0.015	-0.012	0.755
VPA	0.000	0.012	0.870	0.042	0.205	0.005	0.002	-0.046	0.531
Model 1	0.007	-0.003	0.712	0.096	0.167	0.000	0.007	-0.042	0.735
Model 2	0.017	-0.018	0.685	0.097	0.165	0.003	0.020	-0.057	0.615
SED	0.000	-0.018	0.797	0.004	-0.060	0.412	0.005	-0.072	0.325
Model 1	0.007	-0.008	0.709	0.074	-0.063	0.003	0.009	-0.065	0.630
Model 2	0.017	-0.018	0.684	0.075	-0.059	0.018	0.023	-0.075	0.551

Model 1- adjusted with age and gender; model 2 –adjusted with age, gender, parental education and participation in organized sport

FM—fat mass; FFM—fat free mass; BMI—body mass index; FFM—fat free mass; SED- sedentary time; VPA—vigorous physical activity; MVPA—moderate-to-vigorous physical activity