Relationships between physical activity and muscular strength among healthy adults across the lifespan

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Table 3 Multivariate models of correlates of lower body muscle strength among STOMP participants (n = 412)

Muscle strength	Predictors	β	T	Partial r	r²	p
Isometric knee extension	Gender	−0.574	−16.363	−0.634		<0.001
	Age	−0.342	−9.919	−0.445		<0.001
	BMI	0.185	5.248	0.254		<0.001
	Time in sedentary behavior (min/day)	−0.097	−2.809	−0.139		0.005
Model summary					0.527	<0.001
Isokinetic knee extension 60°/s	Gender	−0.606	−19.295	−0.695		<0.001
	Age	−0.404	−13.560	−0.562		<0.001
	BMI	0.155	5.022	0.244		<0.001
	Total energy expenditure (kcal/day)	0.099	3.052	0.151		0.002
Model summary					0.656	<0.001
Isokinetic knee extension 180°/s	Gender	−0.618	−18.581	−0.682		<0.001
	Age	−0.361	−11.430	−0.497		<0.001
	BMI	0.106	3.230	0.160		0.001
	Total energy expenditure (kcal/day)	0.101	2.941	0.146		0.001
Model summary					0.615	<0.001
Knee endurance extension	Gender	−0.651	−24.225	−0.772		<0.001
	Age	−0.451	−17.658	−0.663		<0.001
	BMI	0.146	5.511	0.266		<0.001
	Total energy expenditure (kcal/day)	0.088	3.181	0.157		0.002
Model summary					0.748	<0.001