Medial knee collapse, also known as knee valgus, is when the knee collapses or falls inward during any sort of weight-bearing activity, like a squat, during gait, or during sport-specific movements like cutting. Knee valgus is characterized by hip adduction and hip internal rotation in a flexed hip position. This position of the knee is most commonly associated with a non-contact mechanism of injury of the Anterior Cruciate Ligament (ACL), and occurs in the running or jumping athlete during the deceleration phase of a cutting movement. The gluteus maximus plays an interesting role in medial knee collapse and can help with preventing knee valgus. In this article, we will show you how to prevent knee valgus with gluteus maximus targeted exercises!