Lie on a bosu with your low back pressing it and with your feet flat on the floor. Your knees should be at 90º Place your hands on either side of the bosu Contract your pelvic floor and core. Your head should always facing forward. Fully extend your legs in front of you.
Curl the spine and move the torso upward while you move your knees towards the torso. Exhale during the movement. Return to the starting position in a smooth movement while you inhale.TIPS: Focus on slow and controlled movement Don't separate your low back from the bosu when you do the exercise.