Purpose: to develop and add size to the calves (the gastrocnemius, the deeper calve muscle).
Execution: Stand with your toe on the edge of a platform. Using your hands only for stability, hold onto something stable so that you do not lose your balance. Keeping your leg straight (but not locked at the knee), lower your heel as far as possible towards the floor feeling the calve muscle stretch. From the bottom of the movement, come up onto your toe as far as possible, feeling the calve contract at the top of each rep. Lower yourself slowly back to the start position before coming up for another rep.