Lie face up, with your back flat on an exercise mat and knees bent at 45 degrees with your feet placed firmly on the floor. Your arms should be by your sides. This is your start position. Proceed to reach your right hands towards the heel of your right foot. Be sure to keep your core braced throughout and not let your lower back arch. Reverse the movement and perform the same sequence with the opposite hand. Perform this alternating movement for the required number of reps (or time).