Table 7. Regression models of the performance in the different physical fitness tests.

Variable	Analysis	R2	p value	Included independent variables	SC	p value	Equation
Long jump	Model 1	0.47	0.001	Fat mass (%)	−0.47	<0.001	Long jump = 2.322 − 0.019*fat mass (%)
		Model 2	0.68	<0.001	Fat mass (%)	−0.53	<0.001	Long jump = 2.277 − 0.021*fat mass (%) + 0.135*maturity offset (years)
	Maturity offset				0.49	<0.001
Medicine ball throw	Model 1	0.69	<0.001	Sitting height	0.83	<0.001	Medicine ball throw = − 15.667 + 0.249*sitting height
		Model 2	0.74	<0.001	Sitting height	0.67	<0.001	Medicine ball throw = −14.710 + 0.202*sitting height + 0.136*corrected arm girth
	Corrected arm girth				0.27	0.005
CMJ	Model 1	0.26	<0.001	Fat mass (%)	−0.51	<0.001	CMJ = 36.625 − 0.421*fat mass (%)
		Model 2	0.53	<0.001	Fat mass (%)	−0.65	<0.001	CMJ = −7.860 − 0.538*fat mass (%) + 1.462*corrected leg girth
	Corrected leg girth				0.54	<0.001
CMJ power	Model 1	0.85	<0.001	Muscle mass	0.92	<0.001	CMJ power = −71.982 + 33.613*muscle mass (kg)
		Model 2	0.88	<0.001	Muscle mass	0.77	<0.001	CMJ power = −689.738 + 28.077*muscle mass (kg) + 4.396*height (cm)
	Height				0.24	<0.001
20 m sprint	Model 1	0.45	<0.001	Fat mass (%)	0.67	<0.001	Sprint = 3.425 + 0.024*fat mass (%)
		Model 2	0.53	<0.001	Fat mass (%)	0.65	<0.001	Sprint = 4.488 + 0.023*fat mass (%) − 0.074*age (years)
	Age				−0.28	<0.001
Agility test	Model 1	0.45	<0.001	Fat mass (%)	0.67	<0.001	Agility = 3.425 + 0.024*fat mass (%)
		Model 2	0.55	<0.001	Fat mass (%)	0.70	<0.001	Agility = 3.452 + 0.025*fat mass (%) − 0.080*maturity offset (years)
					Maturation offset	−0.32	0.004
		Model 3	0.60	<0.001	Fat mass (%)	0.72	0.001	Agility = 2.951 + 0.026*fat mass (%) − 0.115*maturity offset (years) + 0.005*ilioespinale height (cm)
									Maturation offset	−0.46	0.001
	Ilioespinale height				0.27	0.017

Notes.

SC

Standardiced coeficients