Grasp dumbbell in one hand to side. Position toes and balls of feet on calf block with arches and heels extending off. Place hand on support for balance.
Raise heels by extending ankles as high as possible. Lower heels by bending ankles until calves are stretched. Repeat.
Exercise step that will not overturn can be used as calf block. Keep knees straight throughout exercise or bend knees slightly only during stretch. Quadriceps serve as synergists muscle if knees are bent slightly during stretch. If holding heavy dumbbell becomes too difficult, try single leg calf raise.