The Main and Interactive Effects of Biological Maturity and Relative Age on Physical Performance in Elite Youth Soccer Players

Table 8

Descriptive variables and comparisons of positional means ± SD in physical performance tests between outfielders and goalkeepers.

	Outfielders	Goalkeepers
CA (years)	13.24 ± 1.36	13.73 ± 1.52
Height (cm)	161.1 ± 11.7	165.9 ± 12.1
Weight (cm)	48.0 ± 10.9	53.5 ± 10.6
5 m (s)	1.11 ± 0.10^∗	1.15 ± 0.09
20 m (s)	3.33 ± 0.25	3.43 0.27
COD (s)	2.34 ± 0.17	2.40 ± 0.17
CMJ (cm)	29.4 ± 5.64	29.0 ± 6.02
RSI	2.10 ± 0.37	2.02 ± 0.30

Note. CA: chronological age; COD: change of direction; CMJ: countermovement jump; RSI: reactive strength index. , difference between outfielders and goalkeepers.