Begin by standing comfortably with your feet shoulder width apart.
Lift the first leg up at least 8 inches from the ground. Bring the foot down forcefully as if you are angry.
Repeat with the other leg.
No stomping if you feel pain in the hip, knee or foot upon impact; no stomping with the vest.
From a standing position, bend the knees, bring the arms back and lean the body slightly forward.
In one smooth motion, swing the arms forward and up, and jump as high as you comfortably and safely are able.
You do not need to perform the jumps quickly one after another. In fact, resting two to four seconds between jumps is beneficial to your joints and your skeleton.