US Patent 7798943 Exercising device

An exercising device has two rails, two feet, two sliding footrests, an articulated assembly, at least one resilient member and two handles. The rails are parallel. The feet are mounted on the rails. The sliding footrests are mounted slidably on the rails. The articulated assembly is mounted on the rails and is connected pivotally to the sliding footrests. The handles are mounted detachably on the articulated assembly. The exercising device allows conditioning of a neck, arms, thighs, abdomen and back, especially vastus lateralis and vastus medialis muscles of the thighs.