Stand up straight on a step with your heels off the edge.
Stand with your feet parallel with the floor.
You may want a wall or a sturdy table in front of you for support.
Transfer your weight onto the leg that you would like to exercise.
Quickly drive through the ball of your foot to raise your heel up as though you are about to jump but not quite.
Control the movement as you lower your heel back down at a fast pace.
Just before your heel reaches the start position, repeat the movement quickly.
Ensure you continue at a steady, powerful pace.
Do not allow your heel to drop below the step.
