Position shoulders under shoulder pads with back against back pad. Place feet on platform shoulder width apart. Extend hips and knees. Position toes and balls of feet on nearest edge of platform with arches and heels extending off.
Raise heels by extending ankles as high as possible. Lower heels by bending ankles until calves are stretched. Repeat.
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.