This exercise uses the circular movement of the legs to create engagement in the oblique abdominals.
To do this exercise you will need a mat and a large physioball. Start by bearing weight on your hands with your shins on the large ball. Inhale into the back of your ribs and then exhale as you draw your knees to your right armpit, then pass the knees underneath you and then point the knees at the left armpit, and finally inhale as you lengthen them long behind you. Repeat 6 times in one direction and then reverse.
Things to think about
As you are making the circles with your knees, be sure that you are pointing the crown of your head towards the ground. This will allow your spine to be the longest that it can be.
Make sure that your shoulders are stabile and connected to your back. This will help maintain the connection of the ribcage to the pelvis as you rotate.