* Begin in a modified push-up position with your elbows bent at 90-degrees and your forearms resting on the floor. * Your elbows should be directly underneath your shoulders. * Your feet should be together with only your toes touching the floor. * Your head should be down so that you are facing the floor. * Your body should form a perfectly straight line from the crown of your head to your heels. * Engage your core and low back muscles. * Hold the position as long as you can to strengthen your core increase stability. * Be sure to keep breathing in and out as steadily as you can without arching your back.