Back pain is the most common medical complaint and can be the most frustrating injury. According to the American Physical Therapy Association, 8 out of 10 people may experience back pain at some point in their life. Back pain causes more days away from work than any other condition. Factors contributing to low back pain include poor body mechanics, strenuous activity, trauma, degeneration, and sedentary lifestyle. There is good news though - back pain is treatable.