- Start standing with a wall on your right side. Place a large exercise ball on the wall at knee height. If you don't have an exercise ball, you can use a soccer ball or basketball.
- Bend and lift your right knee. Place it against the ball, pushing against the ball to keep it in place.
- Bend your left leg to perform a mini squat, keeping your abs pulled in toward your spine and your chest lifted. Make sure your knee stays over your ankle. The ball will roll down the wall a bit as you squat.
- Push through your left heel to come back to the starting position.
- This counts as one rep. Complete six reps on each leg, then repeat for two sets.
If you don't have a ball to push into, place a pillow on the wall. Take out the mini squat and just focus on pushing your knee into the pillow.