Lie forward so chest is on pad and shoulders are under padded bars. Position toes and balls of feet on calf block with arches and heels extending off. Grasp handles or sides of padded bars. Stand erect by extending hips and knees. Release lever if available.
Raise heels by extending ankles as high as possible. Lower heels by bending ankles until calves are stretched. Repeat.
Sled can be positioned just below lowest range of motion. Keep knees straight throughout exercise or bend knees slightly only during stretch. Quadriceps serve as synergists muscle if knees are bent slightly during stretch. See Calf Exercise Analyses.