Press your arms on the pillow on the floor and straighten your legs back to make your body in a straight line. Stretch your right arm and lift it on the floor. After a short pause, put down your arm and return to the initial position, trying to keep your body in a straight line during the whole process. Lift the arm forward parallel to the floor, then lift it up and return to the initial action. Switch arms in 30 seconds and do it for another 30 seconds. Then take a deep breath for 30 seconds and relax.