Place your hands behind your head with your elbows just off the floor
Lift your chin towards your chest and curl the chest towards the knees in a deep upper ab curl
Exhale as you bend the right knee in towards your chest and extend the left leg straight out about 45 degrees off the floor with pointed toes; at the same time cross your left armpit over to your right knee feeling the rotation at the waste and into your side oblique muscles.
Inhale and pull the left leg back in and rotate your upper trunk through center
Exhale and cross the right armpit over towards the left knee
Remember to keep your pelvis very stable as you rotate the upper body on the diagonal
Supine position
If you have the following injuries, use caution while doing this exercise: