Muscles Worked: Abdominal muscles, back muscles.
Starting Position: Sit on a carpet or a floor mat with your heels on the ground and your knees bent. Extend your arms directly out in front of you.
Action: Slowly lower your upper body to the ground without letting your heels come off the ground. Stop once your upper back touches the ground. Do not let your upper shoulders or your head touch the ground.
Raise your upper body back to the starting position without letting your heels come off the ground.
1. Move your heels further away from your glutes to make the exercise easier
2. Move your heels closer to your glutes to make the exercise harder.
3. Hold a weight against your chest to make the exercise harder.