Exercise on BOSU, focusing on the obliques.
- Lay on your side on the BOSU, your top leg outstretched and your bottom leg bent comfortably. Use one arm to stabilize you on the BOSU and the other arm should be straight along your side.
- Contract your oblique muscles to pull your upper body upwards, and reach your upper arm towards your knee. Ensure that your torso does not twist. Repeat 10-15 times and switch sides.