Physical parameters of injured and non-injured male athletes
| Fitness parameter | Age | 14 | 15 | 16 | 17 | 18 | 19 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ACL | Injured | Non-injured | Injured | Non-injured | Injured | Non-injured | Injured | Non-injured | Injured | Non-injured | Injured | Non-injured | |
| N | 0 | 41 | 4 | 33 | 5 | 33 | 5 | 28 | 2 | 26 | 2 | 16 | |
| FLE:EXT R (Index) | Mean±SD | No ACL injuries | 0.79 (±0.09) | 0.95 (±0.20) | 0.83 (±0.23) | 0.94 (±0.18) | 0.65 (±0.14) | 0.92 (±0.17) | 0.99 (±0.16) | 0.95 (±0.19) | 1.10 (±0.20) | 0.91 (±0.17) | |
| Minimum | 0.68 | 0.57 | 0.64 | 0.55 | 0.51 | 0.57 | 0,88 | 0.61 | 0.90 | 0.61 | |||
| Maximum | 0.89 | 1.76 | 1,16 | 1.46 | 0.84 | 1.34 | 1.11 | 1.79 | 1.20 | 1.31 | |||
| REL FF and REL EF (N/kg) | Mean±SD | 27.88 (± 8.38) | 30.69 (±6.20) | 29.81 (±4.92) | 32.58 (±5.46) | 33.88 (±8.08) | 34.02 (±5.97) | 33.27 (±2.72) | 34.69 (±6.71) | 28.12 (±4.61) | 36.26 (±6.46) | ||
| Minimum | 23.03 | 16.58 | 22.12 | 22.47 | 25.97 | 21.41 | 31.34 | 20.39 | 24.80 | 24.77 | |||
| Maximum | 40.38 | 47.97 | 34.34 | 48.44 | 47.18 | 50.92 | 35.19 | 51.98 | 31.32 | 56.35 | |||
| RSI (mm/ms) | Mean±SD | 1.33 (±0.36) | 1.71 (±0.36) | 1.73 (±0.40) | 1.84 (±0.31) | 1.87 (±0.36) | 1.94 (±0.35) | 1.76 (±0.08) | 2.03 (±0.34) | 2.10 (±0.24) | 2.05 (±0.39) | ||
| Minimum | 0.81 | 0.99 | 1.31 | 1.22 | 1.46 | 1.15 | 1.71 | 1.26 | 1.97 | 1.34 | |||
| Maximum | 1.62 | 2.76 | 2.23 | 2.60 | 2.36 | 2.81 | 1.82 | 2.99 | 2.34 | 3.41 | |||
ACL, anterior cruciate ligament; FLE:EXT R, ratio of absolute flexion to extension force; REL EF, relative extension force; REL FF, relative flexion force; RSI, reactive strength index.