Table 1. Physical characteristics and ball velocity difference between adolescent and collegiate pitchers. Values are expressed as mean (±SD).
Adolescent pitcher(n = 32) Collegiate pitcher(n = 30) ES
Age (yr) 13.9 (.6) 19.6 (.9)* 7.44
Height (m) 1.64 (.08) 1.77 (.05)* 2.02
Weight (kg) 54.1 (10.5) 72.7 (.9)* 1.85
Ball velocity (m·s-1) 30.7 (2.7) 35.2 (1.9)* 1.96
ES; effect size value.
* p < 0.01, Significant difference between adolescent and collegiate pitchers