Stand with feet together. Take a controlled lunge (or large step) backward with your left foot. As you lunge back with your left foot, drive your left arm forward to maintain your balance. Your knees should be bent at 90-degree angles.
Your right knee should be positioned directly over your ankle, and your left heel should be lifted.
From the ground, drive your left knee up and come into a hop in the air with your left leg lifted at a 90-degree angle. Simultaneously drive your right arm up to maintain your balance.
Land softly back in a lunge.
This completes on rep. Do the same amount of reps on both sides.