Objectives: To assess the relationship between dynamic knee motion in female athletes during landing after
jumping and lower limb clinical physical measurements, considered risk factors for anterior cruciate ligament (ACL)
injury. We proposed that (1) knee valgus and flexion angles during landing are correlated with clinical physical
measurements; (2) combining these measurements enables prediction of the knee valgus and flexion angles during
Methods: Sixty-one female collegiate basketball athletes performed a continuous jump test; the peak knee valgus and
flexion angles were measured. The Q-angle, the ranges of motion (ROMs) of hip internal rotation (IR) and external
rotation (ER), as well as ankle dorsiflexion (DF), navicular drop, leg–heel alignment, and balance ability as assessed by
the Star Excursion Balance Test (SEBT) were measured. Stepwise linear regression analyses were used to assess whether
these factors can predict the peak knee valgus or flexion angle.
Results: Increased ROM of hip IR and navicular drop predicted 7.9% of the peak knee valgus angle variance. Increased
ROMs of ankle DF and hip IR, navicular drop, and anterior balance predicted 29.0% of the peak knee flexion angle
variance. The knee valgus and flexion angles during the continuous jump test were slightly correlated with clinical
Conclusions: Proximal and distal joint alignment and balance ability influence knee motion during landing. The
relationship between knee motion during landing and these factors is weak; therefore, lower limb movement during
landing is almost independent of clinical physical measurements, and knee movement should be evaluated by itself.