Increased knee valgus loading has been previously identified as a possible risk factor for non-contact anterior cruciate ligament (ACL) injury. Arm position during landing may affect the risk of injury by increasing the knee valgus load. The goal of this study was to examine the kinematics and kinetics of the knee joint during single-leg drop landings from platform heights that was subject specific. Ten subjects (5 female, 5 male) were selected to participate in this single-leg landing study. No significant difference in knee kinematics was noted between arm positions, or gender. Significant difference (p < 0.05) was noted in the varus/valgus knee angle at initial contact (VVIC) when comparing the 60% vertical max jump percentage (%VJMax) to the 80% VJMax and 100% VJMax.

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