Most people in the United States will experience back pain at some time in their lives. Causes of back pain are many ranging from poor posture, heavy lifting and lack of exercise amongst others. Some find relief through chiropractic or acupuncture therapy. Most pain goes away within a few days or weeks only to return at a later date. Unless the root cause is fixed, most treatments only offer temporary relief. In many cases, the root cause of back pain is tight hamstring muscles. Excessive sitting can tighten these muscles as well as lack of proper stretching on a regular basis. The following set of exercises develop strength and flexibility which improve posture.