Start with feet wider than hip distance and toes facing opposite directions. Keeping your weight in your heels, lower yourself down into a deep sumo squat. Add a couple of pulses to the bottom of your squat before you slowly stand up, keeping your back straight.
As you come to the top of the squat, transfer weight from your heels to your toes and slowly rise up into a calf raise (keeping feet in sumo squat stance). Squeeze calves the entire time and try to balance on your toes for at least five seconds.
Slowly bring yourself down from the calf raise and immediately go back into a sumo squat.
Repeat each move 10 times each for one complete circuit. Perform the circuit twice.