This study will identify the most optimal, focused approach for biofeedback in adolescent females at high risk for anterior cruciate ligament (ACL) injury. A six-week randomized, pre/post-testing design will be used to identify biofeedback training effects. The investigators will also determine the effects of hip strategy on retention of decreased knee abduction load with focused biofeedback. A six-month follow-up design will be used to test retention of real-time biofeedback intervention.