Swiss Ball Oblique Sit-Up

Stand side on to a wall or a ledge, with the swiss ball placed on the opposite side. Lean on the ball with your hip and have the leg closest to the ball out the front with your foot against the base of the wall/ledge and your other leg out the back. The wider your feet position, the more stable you will be. Place your hands by your ears, bracing your core and keeping your elbows out wide, crunch down sideways as far as your strength and mobility allows. Raise your torso and then crunch down your opposite side. Repeat for the desired number of repetitions then repeat on the opposite side.
Tip: To decrease the difficulty of this exercise you can place your arms across your chest.
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