. 2021 Apr 27;18(9):4646. doi: 10.3390/ijerph18094646

Table 2.

Descriptive statistics of parameters of the force-velocity profiles in sprinting and vertical jumping, and correlation coefficients and p-values between these parameters, either not controlling for or considering the influence of training experience and body size, and both maturity offset and chronological age (CA).

			Maturity Offset				CA
			Bivariate r		Partial r		Bivariate r		Partial r
Sprinting	Mean	SD	r	p	r	p	r	p	r	p
F₀ (N)	309.43	132.15	0.89	<0.001	0.7	<0.001	0.85	<0.001	0.62	<0.001
V₀ (m·s⁻¹)	6.57	1.06	0.77	<0.001	0.45	<0.001	0.79	<0.001	0.51	<0.001
P_max (W)	530.41	286.63	0.92	<0.001	0.78	<0.001	0.9	<0.001	0.73	<0.001
FV slope (N·s·m⁻¹)	2572.87	1714.82	−0.79	<0.001	−0.56	<0.001	−0.74	<0.001	−0.51	<0.001
DRF (%)	–0.09	0.02	0.29	0.005	0.18	0.098	0.29	0.007	0.2	0.065
RF peak (%)	0.43	0.05	0.59	<0.001	0.26	0.015	0.61	<0.001	0.3	0.005
Jumping	Mean	SD	r	p	r	p	r	p	r	p
F₀ (N)	1407.2	618.21	0.91	<0.001	0.79	<0.001	0.89	<0.001	0.75	<0.001
V₀ (m·s⁻¹)	3.62	1.08	0.23	0.034	0.11	<0.001	0.21	0.226	0.07	0.508
P_max (W)	1277.69	695.75	0.87	<0.001	0.67	<0.001	0.83	<0.001	0.6	<0.001
FV slope (N·s·m⁻¹)	2292.78	1300.53	−0.01	0.916	−0.03	0.771	−0.0	0.519	−0.01	0.923
FV deficit (%)	8.63	3.69	0.49	<0.001	0.17	0.122	−0.09	0.39	0.11	0.328

SD, standard deviation; r, Pearson’s correlation coefficient; F₀, theoretical maximal force; V₀, theoretical maximal velocity; FV slope, force-velocity slope; P_max, theoretical maximal power; FV deficit, percent difference respect to the optimal FV profile; DRF, decrease in the ratio of horizontal force; RF peak: maximal ratio of horizontal force; Bivariate r: bivariate Pearson’s correlation; Partial r: partial correlation controlling for training experience (years of specific soccer training) and body size (product of body mass and stature residuals [individual values minus the mean]);. Statistical significance set at p < 0.05.