Using any raised platform, support your forefoot and press your heel down. Don't bounce. Hold for six seconds, release, repeat, then switch sides. This will also pick up the gastrocnemius - the inteior calf muscles - and the hamstring.
Primary Muscle Group: Calves
Muscle Groups Worked in This Exercise: Calves
Preparation: Lean forward and bend at the hips so that your arms extend out and touch the ground. Keep your feet on the floor along with your hands.
Breathing: Breath throughout the exercise stretch movement