Table 3.

Descriptive statistics of male basketball players based on chronological age and ANOVA results comparing age groups.

Variable	Under 13 (n = 233)		Under 14 (n = 364)		Under 15 (n = 221)		F (p)	η2	d
	M	SEM	M	SEM	M	SEM
Chronological age (years)	13.04	0.02	13.96	0.02	14.75	0.02	–	–	–
APHV (years)	13.11	0.03	13.10	0.02	13.15	0.03	1.23	< 0.01
Body height (cm)	168.3	0.6	175.7	0.5	180.4	0.5	110.32 (**)	0.21	1v2v3
Body mass (kg)	56.3	0.8	63.6	0.6	69.5	0.8	74.67 (**)	0.15	1v2v3
Standing reach (cm)	226.1	0.9	235.8	0.6	241.6	0.7	92.39 (**)	0.18	1v2v3
5 m (s)	1.177	0.007	1.141	0.005	1.134	0.006	13.86 (**)	0.04	1v2,3
10 m (s)	2.001	0.010	1.929	0.007	1.905	0.007	36.50 (**)	0.08	1v2,3
20 m (s)	3.488	0.016	3.333	0.010	3.262	0.011	74.88 (**)	0.15	1v2v3
Agility—S1 (s)	1.591	0.011	1.555	0.009	1.553	0.009	4.44 (*)	0.04	1v2,3
Agility—S2 (s)	5.495	0.047	5.346	0.026	5.179	0.038	16.27 (**)	0.04	1v2v3
Agility—S3 (s)	7.387	0.050	7.108	0.032	6.934	0.038	28.83 (**)	0.07	1v2v3
Agility—S4 (s)	9.668	0.062	9.296	0.045	9.086	0.048	27.69 (**)	0.06	1v2v3
Agility—S5 (s)	13.148	0.082	12.606	0.055	12.288	0.060	37.47 (**)	0.08	1v2v3
AgilityTotal (s)	15.052	0.094	14.429	0.063	14.063	0.067	38.46 (**)	0.09	1v2v3
SVJmax (cm)	268.9	1.1	283.1	0.8	292.1	0.8	146.28 (**)	0.26	1v2v3
VJmax (cm)	280.5	1.2	296.0	0.9	307.4	1.0	149.59 (**)	0.27	1v2v3
SVJ (cm)	42.8	0.5	47.3	0.4	50.6	0.5	65.03 (**)	0.14	1v2v3
VJ (cm)	54.4	0.7	60.2	0.5	65.9	0.6	77.96 (**)	0.16	1v2v3
Yo-Yo distance (m)	1003	33	1269	29	1423	40	34.04 (**)	0.08	1v2v3
Yo-Yo VO2max (ml/kg/min)	44.8	0.3	47.1	0.2	48.4	0.3	33.99 (**)	0.08	1v2v3

M mean, SEM standard error of mean, S₁–S₅ stages, SVJ standing vertical jump, VJ vertical jump. d significant differences between groups (1—under 13; 2—under 14, 3—under 15).

*p < 0.05, **p < 0.001.