Association of objectively measured physical activity with body components in European adolescents

BMC Public Health

Table 3 Linear regression models of physical activity (PA) with markers of fat-free mass (Models I and II)

Fat free mass^a(Model I)				Fat-free mass^a(Model II)			FFMBIA^b(Model I)			FFMBIA^b(Model II)
Males	β	R ²	P	β	R ²	P	β	R ²	P	β	R ²	P
Light PA^c	−0.119	0.475	<0.001	−0.124	0.477	<0.001	−0.093	0.387	0.001	−0.117	0.495	0.001
Moderate PA^c	−0.044	0.465	0.083	−0.042	0.466	0.095	−0.059	0.383	<0.05	−0.039	0.485	0.111
Vigorous PA^c	0.078	0.469	0.001	0.095	0.473	0.001	−0.026	0.380	0.331	0.063	0.487	<0.05
MVPA^c	0.025	0.464	0.310	0.033	0.465	0.190	−0.041	0.381	0.124	0.016	0.484	0.521
Average PA^c	0.046	0.465	0.062	0.054	0.467	<0.05	−0.029	0.381	0.270	0.023	0.484	0.360
Females
Light PA^c	−0.012	0.202	0.678	−0.014	0.263	0.607	0.000	0.174	0.987	−0.007	0.309	0.800
Moderate PA^c	0.014	0.202	0.613	0.025	0.263	0.361	−0.006	0.174	0.846	0.006	0.309	0.832
Vigorous PA^c	0.023	0.203	0.405	0.075	0.268	<0.01	−0.015	0.174	0.595	0.057	0.312	<0.05
MVPA^c	0.019	0.202	0.507	0.051	0.265	0.065	−0.015	0.174	0.603	0.028	0.310	0.293
Average PA^c	0.042	0.204	0.142	0.07	0.267	<0.05	0.009	0.174	0.755	0.048	0.311	0.077

Model I includes adjustment for pubertal status, family affluence scale and country.
Model II includes adjustment for model I + skinfold thickness.
β, standardized regression coefficients; R ², coefficients of determination.
BMI indicates body mass index, MVPA indicates moderate and vigorous PA.
^aDerived from Slaughter equation [26], ^bderived from bioimpedance [29], ^ctransformed data.

ISSN: 1471-2458