You can view the original Jackknife stretch.. this version is upgraded, sleeker, sharper and better in several ways..

1. Lie on your back with your arms and less held just off the floor
2. Bring your arms and legs up, keeping them straight, to meet above your stomach.
3. Lower yourself back to the starting point slowly.. to avoid any injury.. and make sure you keep your arms and legs straight.

Using a gym ball allows you to stretch your abs more than stretching on floor would. With the ball underneath your lower back, relax your abs and stretch your arms out over your head. Gradually increase the pressure on the muscle for 15-30 seconds without bouncing. This is an incredible move and you feel results immediately. We recommend a slow start and finish – do not rush yourself back up as you can risk an injury pull – bring yourself off the ball slowly and return to full standing posture.