Table 4

Physical parameters of injured and non-injured male athletes

Fitness parameterAge141516171819
ACLInjuredNon-injuredInjuredNon-injuredInjuredNon-injuredInjuredNon-injuredInjuredNon-injuredInjuredNon-injured
N041433533528226216
FLE:EXT R (Index)Mean±SDNo ACL injuries0.79 (±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)
Minimum0.680.570.640.550.510.570,880.610.900.61
Maximum0.891.761,161.460.841.341.111.791.201.31
REL FF and REL EF (N/kg)Mean±SD27.88 (± 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)
Minimum23.0316.5822.1222.4725.9721.4131.3420.3924.8024.77
Maximum40.3847.9734.3448.4447.1850.9235.1951.9831.3256.35
RSI (mm/ms)Mean±SD1.33 (±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)
Minimum0.810.991.311.221.461.151.711.261.971.34
Maximum1.622.762.232.602.362.811.822.992.343.41
  • 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.