Table 3 Results of the hierarchical regression analyses: estimated variance (%) in strength and motor performances of soccer players 9–12 and 13–16 years explained by body size and the standardized residuals of the regression of SA on CA (SAsr).

From: Influence of body size and skeletal maturity status on strength and motor performances of soccer players 9–16 years

 

9–12 years

13–16 years

Block 1

Block 2

Block 3

Block 1

Block 2

Block 3

R2

ΔR2

ΔR2

R2

ΔR2

ΔR2

Grip strength, sum R + L, kg

51.6***

2.8

1.7

56.7***

0.6

0.0

5 m sprint, sec

8.9

6.0

1.4

31.4***

3.4

0.0

20 m sprint, sec

10.1*

5.3

4.3

38.7***

3.1

0.5

Acceleration, from 10 to 20 m, sec

9.4

5.5

4.5

39.6***

2.0

0.1

Agility, sec

1.0

5.2

12.7**

6.7

14.3*

0.4

Vertical jump, cm

5.6

0.3

4.5

32.6***

1.3

0.4

Endurance run,

   

11.8

2.0

18.5*

  1. Block 1—variance explained by body size; Block 2—additional variance explained by the interactions between body size and SAsr; and Block 3—variance explained by SAsr alone (Sample sizes are as in Table 1).
  2. Block 1: height and height × weight; Block 2: SAsr × height and SAsr × height × weight; Block 3: SAsr.
  3. *p < 0.05 **p < 0.01 ***p < 0.001.
Back to article page