Movement: Stand facing a wall or other sturdy support and place your arms against it for stabilization. Bring the off leg forward in line with your chest, and gently step the leg to be stretched backward keeping the heel flat to the ground. Lean into the wall or move your back foot farther back to increase the stretch.
Repetitions: Hold for the full prescribed time on one side, then switch sides and repeat. This counts as one set.
Instructions and effects for the Calf Wall Stretch exercise 
Movement in Sagittal Plane