Lie face up, with your back flat on an exercise mat and your legs extended out in front of you. Curl your upper back away from the mat a few inches as you extend your arms and reach them towards your feet. As you do this lift both legs a few inches off the floor, keeping them close together. This is your start position. Proceed to lift your torso further from the floor, as you bring your hands to touch both feet. Simultaneously bend your knees towards your chest. Hold for a moment at this top position. Lower back down with control to the start position. Repeat for the required number of reps (or time).