Table 3. Statistics of the regression analyses with the forward method for the total group and by sex with dependent variable ranking at U13 and U16 in junior elite tennis players (n = 92).
B SE B β R2
Boys(n=44) Ranking U13 Constant 33.35 6.48 .250
Upper body power -0.53 0.14 -.50*
Girls (n=42) Ranking U13 Constant -66.32 28.72 .147
APHV 6.29 2.40 -.38*
Ranking U16 Constant 138.09 51.92 .126
APHV -10.39 4.33 -.36*
* p < 0.05; R2 is the explained variance by the regression.