Lie flat on your back with your feet raised in front of you. Your knees should be around 90º. Place your arms at your sides on the floor. Contract your pelvic floor and core.
Move your knees together towards the right side. Make sure you don't move your shoulders. Return to the starting position in a smooth movement and move your legs towards the left side.TIPS: Focus on slow and controlled movement Don't separate your low back from the floor when you do the exercise.