Here is a simple “exercise” you can do to help relieve back pain. All you need is a *floor, *a yoga mat or rug, and *a coffee table or couch to put your legs up on. Lie down on the mat with your calves up on the table or couch. Your knees and hips should be at a 90-degree angle; knees stacked over hips. Lie there for two to 15 minutes and let gravity do the work of putting your spine, hips, and pelvis back into a neutral position. If necessary, keep your knees stacked by using pillows to support them.