Table 2. Correlation Coefficients for Variables.
| The Free-Kicks | |||
|---|---|---|---|
| Mean ± SD | Correlation Coefficient | Significance | |
| Ball speed, m/s | 17.99 ± 2.36 | 0.18 | 0.29 |
| Head speed, m/s | 3.61 ± 1.51 | 0.08 | 0.65 |
| Angle of the head | 59.94 ± 20.17 | -0.29 | 0.11 |
| Angle of the trunk | |||
| Flexion | 14.32 ± 12.01 | -0.17 | 0.43 |
| Extension | 22.67 ± 9.41 | -0.19 | 0.62 |
| Strength of neck flexor muscles, kg | 12.41 ± 2.95 | -0.11 | 0.51 |
| Head perimeter | 56.37 ± 1.87 | -0.50b | 0.00 |
| Percentage of subcutaneous fat | 12.29 ± 3.34 | -0.39a | 0.02 |
| Body mass, kg | 67.66 ± 8.49 | -0.38a | 0.02 |
| Age, y | 20 ± 5.17 | -0.43 b | 0.01 |
aSignificant Correlation (P ≤ 0.05)
bSignificant Correlation (P ≤ 0.01)