This core exercise focuses on the obliques.
Begin by laying on your back on the BOSU. The BOSU should rest in the curve of your lower back. Knees should be bent with your feet resting on the floor and arms crossed over your chest.
Raise one leg and, using your abdominal muscles, slowly pull your upper body towards this leg. Slowly lower yourself back to the starting position and repeat on the other side. Repeat this exercise 15-20 times per side.
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