A device which restricts movement of the knee during lunge and squatting exercises prevents weight imbalance which may result in undue strain and knee injury. The device has a foot engagement member stepped upon by the user and held in place by the user's weight, or the foot engagement member conforms to the side of the user's foot and is held in place by a strap. Attached to the foot engagement is a vertical member extending upwardly from the foot engagement member. A shin engagement member attached to the vertical member is generally positioned in a position along the lower leg of the user, below the knee and laterally adjacent to the user's tibia. As the user performs exercise, the shin engagement member prevents the user's knees from forward movement which extends forward of the user's feet. The device also has structure which prevents inward collapse of the knees.
