A dedicated leg extension machine is the easiest and most optimal way to perform leg extensions. Alternatives are available for those without access to a leg extension machine. Leg extensions can be performed in a regular chair, using gravity or a resistance band for added tension. Other practical leg extension alternatives include the reverse Nordic curl, Bulgarian split squat, and hack squat. Lifters can also perform a standing leg extension using a cable machine with an ankle cuff attached to isolate the quads. These exercises develop strength and muscle mass within the quadriceps.