1) Stand tall with your left leg in front of the right, extend your hands up toward the ceiling, keeping arms straight.
2) Shift your weight onto your left foot, and raise your right knee to the height of your hips. Simultaneously go up on the toes of your left leg, while pulling your elbows down by your sides, your hands forming fists. This creates the crunch.
3) Pause at the top of the movement, and then return to the starting position. Repeat the sequence with your right leg as the standing leg. Repeat 8-12 times on each leg.
Proper movement ques:
Standing leg should be straight as you raise up on your toes. Shoulders should be relaxed as you pull your arms down for the crunch.
Avoid: Tilting forward as you switch legs
This exercise strengthens the core, calves and gluteal muscles as well as improving balance.