Relationship of Hip and Trunk Muscle Function with Single Leg Step-Down Performance

Abstract Objectives Evaluate the relationship of hip and trunk muscle function with the Single Leg Step-Down test (SLSD). Study Design Laboratory study. Setting Biomechanics Laboratory. Participants 71 healthy participants with no history of anterior cruciate ligament (ACL) or lower extremity injury in the last 3 months completed this study (38 males, 33 females; mean 25.49±0.62 years). Main Outcomes Hip abduction(HABD), external rotation(HER), and extension(HEXT) peak isometric force was measured. Trunk endurance was measured with plank(PL) and side plank(SPL) tests. SLSD repetitions in 60-seconds and dynamic knee valgus(VAL) were recorded. Results PL, SPL, HABD, HER, and HEXT were positively correlated with SLSD repetitions. PL(r=0.598, p