Instructions:

1. Lie on a decline bench with your feet secured and your knees bent at a 90-degree angle.
2. Place your hands behind your head or across your chest.
3. Engage your abs and lift your upper body towards your knees, curling your torso.
4. Pause for a moment at the top, then slowly lower your upper body back down to the starting position.
5. Repeat for the desired number of repetitions.