This high-impact exercise strengthens your Rectus Abdominis, or your "six-pack muscle."
Getting in the Starting Position
1Find an incline bench. This exercise will work best if you have a support bar under which to hook your feet as well.
2Sit on the bench with your knees bent. Your feet should be on the uphill side of the bench.
3Lie down so that your upper body is facing downhill. Place your hands behind your neck or on the side of your neck.
Performing the Exercise
1To make this exercise more challenging, place your hands further up on your head.
2In addition, you can try using a higher incline board or holding weights as you do the exercise. 
- The benefits of this exercise are increased strength and flexibility in your abs, specifically your rectus abdominis.
- To make this exercise less challenging, you can cross your arms across your chest. To make it even less challenging, try lowering the height of the incline board.
- Potential injuries to your head and neck may be incurred if this exercise is performed incorrectly.
Things You Need
- Incline board
- Support bar