Place your hands on the floor or on the sides of the bench or ball for support, keeping your legs straight and your toes pointed.
Inhale and start the exercise by pulling your knees towards your chest, rolling the ball towards you as you contract your abs.
Hold the contracted position for a second, making sure you're squeezing your abs tightly.
Exhale and slowly return to the starting position by straightening your legs, ensuring your movements remain controlled to maximize the exercise's effectiveness.