What is calf stretch on a step?

Calf stretch on a step

1. Stand on the bottom step of a staircase, facing up toward the stairs. Put the balls of your feet on the step. Hold on to the handrail or wall.
2. Slowly let your heels down over the edge of the step as you relax your calf muscles. You should feel a gentle stretch up the back of your leg to your knee.
3. Hold the stretch about 15 to 30 seconds, and then tighten your calf muscle a little to bring your heel back up to the level of the step.
4. Repeat 2 to 4 times.