Your glute maximus is a rotator, not just an extensor. When it shuts down, your knees, back and piriformis pay the price. Knee cave in a squat is rarely a knee issue. It is often a glute that lost its rotational leverage. The gluteus maximus controls hip external rotation, and when it can't hold that angle, the femur drifts inward and the knee follows. ㅤ 1. Adductor Stretch + Seated Side Bend + Cossack Squat, 2 full rounds 2. Anchored Sit-Up + Seated Forward Fold, 3x8 3. Cossack Squat, 3x6 each side, slow and deep ㅤ Comment BASICS for the 4-week Grade 1 Mobility follow-along that fixes this from the ground up. $29, any level. ㅤ #Elastaboy #Reboryn #KneeTracking #GluteFunction #HipRotation