- Lie on your back with your arms at your sides and legs extended.
- Sit up with an explosive movement, simultaneously bringing the right knee to your chest and swinging the left arm forward as if running.
- Fully extend the right leg and return the left arm to the starting position.
- Sit up again, this time bringing the left knee in to the chest as you swing the right arm forward. Repeat, alternating arm and leg movements as though sprinting.
- Repeat, alternating arms and legs.