HOW: Using a step or a stair behind you, place one foot on the elevated surface with toe support. Keeping more of your weight on the foot in front, begin to bounce on the balls of the foot. Keep your ankle pointed down towards the ground. Repeat for duration or repetitions.
FEEL: You should feel the calf working. Can also feel the sides of the shin working.
COMPENSATION: Avoid leaning side to side. Avoid unlocking the knee and the hip.