Sit on seat and position heels on lever platform with fore feet extended off top. Grasp handles to sides and straighten knees.
Pull forefoot back toward body as far as possible while pushing platform with heels. Return feet down to platform and repeat.
Care must be taken to avoid heels from slipping off platform. Begin with very light weight to insure shoes have adequate traction. Keep knees straight throughout exercise. See Dorsal Flexor Calf Exercise Analyses.