Sit on bench or stool. Place both feet under padded lever with heels on pedal.
Lift forefeet upward as far as possible. Return by extending feet until toes are pointed downward. Repeat.
Avoid using other muscles to push pedal down with heels as lever is lifted. Insure full range of motion is practiced. In starting lower position, scoot back on bench just slightly until full planter flexion is felt. Establish range of motion criteria for highest position. See Dorsal Flexor Calf Exercise Analyses.