Stand with your feet about three to four feet apart, toes turned out. Bring your hands together in front of your chest, and squat down so your thighs are parallel with the floor, knees over the ankles.
Raise your left heel off the floor, and begin to pulse the hips up and down, isolating the left calf.
Continue pulsing for 30 seconds, and then switch sides for another 30 pulses. This completes one rep.