Stand on the edge of a step or a slightly elevated surface
Put on a loaded backpack with strap tightened up.
Stand tall with body weight on the ball of the feet and heels hanging over the edge.
Raise your heels a few inches above the edge of the step so that you’re on your tiptoes
Hold the position for a moment, and then lower your heels below the platform, feeling a stretch in your calf muscles
Repeat the movement
