Acute Back Pain Exercise 1 Lie on a firm surface, face down for 5-10 minutes. If lying flat on your stomach in not comforable, place a folded pillow under your stomach. As you become more comfortable, remove the pillow and try lying flat. Use this position several times per day as needed to keep pain minimized. Continue for 3-4 weeks. If at any point these exercises worsen your back or neck pain, or if you notice any new weakness or numbness, stop immediately and notify your physician.