Table 3. Means, (95% confidence internals) and p-values for the effect of fatigue (LSD test) of biomechanical variables measured during landing. Variables Pre-fatigue Post-fatigue P-value (Cohen’s d) Peak Knee valgus (°) 10.6 (7.9-13.3) 10.3 (7.5-13.1) .719(.03) Peak foot abduction (°) 6.6 (4.2-9.0) 8.3 (6.1-10.5) .042 * (.26) Peak VGRF (BW) 4.5 (4.1-5.0) 4.7 (4.3-5.2) .038 * (.14) Peak Rectus NEMG (%) 134 (102-148) 161 (140-183) .018 * (.53) Peak Medial Hamstrings NEMG (%) 115 (98-131) 134 (97-171) .245(.36) Peak Lateral Hamstrings NEMG (%) 106 (88-123) 131 (104-157) .056(.40) Peak Gastrocnemius NEMG (%) 125 (113-137) 132 (105-158) .595(.12) Knee Flexion at contact (°) 20.8 (17.9-23.7) 19.4 (15.9-22.8) .077(.16) * Statistically significant at α=0.05 Abbreviations: LSD = least significant difference, VGRF = vertical ground reaction force, BW = body weight, NEMG = normalized electromyography