Landing mechanics between noninjured women and women with anterior cruciate ligament reconstruction during 2 jump tasks.

Background: Women with anterior cruciate ligament reconstruction have different neuromuscular strategies than noninjured women during functional tasks after ligament reconstruction and rehabilitation.

Hypothesis: Landing from a jump creates high loads on the knee creating dynamic instability in women with anterior cruciate ligament reconstruction, whereas noninjured women have stable knee landing mechanics.

Study Design: Controlled laboratory study.

Kinematic and kinetic reliability of two jumping and landing physical performance tasks in young adult women.

Background: Jumping and landing tasks are commonly used functional measurement tools to assess lower extremity performance in female athletes. However, few studies have established the number of trials needed to achieve reliability of measurement for evaluating landing mechanics.

Objective: To determine the reliability of peak hip and knee joint angles and peak ground reaction forces during two anterior-posterior unilateral functional tasks performed by young women.