Instructions:

1. Sit on the leverage machine with your back against the backrest and your feet on the footrests.
2. Grasp the handles or sidebars for stability.
3. Engage your abs and slowly raise your legs up towards your chest, curling your torso forward at the same time.
4. Pause for a moment at the top, then slowly lower your legs and torso back to the starting position.
5. Repeat for the desired number of repetitions.