CausesBy Mayo Clinic staff
The hamstring muscles are a group of three muscles that run along the back of your thigh from your hip to just below your knee. These muscles make it possible to extend your leg straight behind your body and to bend your knee. When any one of these muscles stretches beyond its limit during physical activity, injury can result.
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- Hamstring muscle injuries. American Academy of Orthopaedic Surgeons. http://orthoinfo.aaos.org/topic.cfm?topic=A00408. Accessed Sept. 28, 2012.
- Sprains and strains. National Institute of Arthritis and Musculoskeletal and Skin Diseases. http://www.niams.nih.gov/health_info/sprains_strains/default.asp. Accessed Sept. 28, 2012.