A supplemental multi-purpose exercise strap for customizing an exercise machine to accomplish a variety of exercises. The strap includes a center attachment member and a plurality of loop members. A first set of loop members is attached to the front of the strap and extend from the center of the strap towards the first end of the strap, while a second set of loop members is attached to the front of the strap and extend from the center of the strap towards the second end of the strap. The loop members are configured to accept a variety of exercise accessories and machines, which allows the strap to assist a user in accomplishing a wide variety of exercises.