Patent ID: 8876675

Claim:
A method of performing a knee extension exercise comprising the steps of: inserting a foot of a user through a body engaging member at a first end of an elongated elastic element stretchable along its length so as to provide resistance during the knee extension exercise, wherein the user is in a seated position with the one or more vastus muscles in an eccentric position and the foot elevated above a floor and below a leg of the user; holding a second end of the elongated elastic element with a hand of the user; and extending the leg of the user at a knee of the user and raising the foot of the user at least by contracting the one or more vastus muscles of the user, so that the elongated elastic element passes through a pulley system as a pulley rotates and provides the resistance from below the knee of the user as the user extends the leg at the knee, wherein the pulley system is removably anchored at the floor by an engagement mechanism to a moveable weighted element and is selectively located at a position substantially below the knee of the user, wherein the resistance strengthens at least the one or more vastus muscles of the user.