Abstract
This study examined repeated bouts of fatigue and its influence on biomechanical variables of drop landings known as risk factors for ACL injury.
A repeated measures ANOVA was performed on fatigued conditions and gender as the independent variables. The dependent variables studied included: max ground reaction force, time to peak ground reaction force, sagittal hip, knee, and ankle angles, frontal knee angles, and knee joint moments. A 20-sec wingate anaerobic test was used as the repeated fatigue protocol and 5-drop landings were recorded in each fatigue condition.
Results indicated that no significant differences across fatigue groups for max vertical ground reaction force, time to peak ground reaction force, knee joint moments (sagittal, frontal, transverse planes), hip flexion, knee flexion, ankle flexion, and knee abduction angles. Gender was noted as a significant factor regardless of fatigue condition on max vertical ground reaction force, ankle and knee flexion, and knee abduction angles.