February 8th, 2010
This move hits your core and obliques in one rhythmic movement
- Lie with a Bosu ball under your hips, your knees bent and your hands by your temples.
- Curl up into a crunch, twisting your torso to the right.
- At the same time, lift your right knee and touch it to your left elbow while straightening your left leg
- Go back to the start and repeat the action on the opposite side
