BODY KINEMATICS DURING SINGLE-LEG LANDING FROM VARYING HEIGHTS AND DISTANCES – IMPLICATIONS FOR NON-CONTACT ACL INJURIES: CASE REPORT

  • Nicholas Ali
  • D. Gordon E. Robertson
  • Gholamreza Rouhi
Keywords: Ground reaction force (GRF), anterior cruciate ligament (ACL), risk factors

Abstract

Single-leg landing is seen as one of the primary mechanisms of non-contact ACL injuries during sports. The objective of this study is to determine how body kinematics varies with changes to landing heights and distances, in order to make inferences based on body kinematics to risk of non-contact ACL injuries. Spearman’s correlation coefficient among selected body kinematics was determined. It was observed that the peak vertical ground reaction force (VGRF) decreased with increasing distance of landing for the male subject, but increased with increasing distance for the female subject. It was observed that knee flexion is highly correlated to landing height (ρ=0.78), and moderately correlated to distance (ρ=–0.65) for the female subject. Knee flexion moderately correlated to landing height and distance (ρ=0.65 and ρ=-0.58, respectively) for the male subject.