http://newsinhealth.nih.gov/2007/January/docs/01features_02.htm
National Institutes of Health, U.S. Department of Health and Human Services
About 80% of the population develops back problems at some time in their lives. When you do battle with Old Man Winter, or tackle any other kind of heavy lifting at home or on the job, do everything you can to reduce the chance of injury. Learn how to minimize your risk and know signs to see a doctor for back pain.