Torn Muscle Anatomy
To better understand muscle strains, it helps to understand the anatomy of the muscles.
Muscles make up about 40% of total body weight. The human body contains over 300 muscles that provide movement for the entire body.
Examples of major muscles include the:
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- Croisier JL, Forthomme B, Namurois MH, Vanderthommen M, Crielaard JM. Hamstring muscle strain recurrence and strength performance disorders. Am J Sports Med. 2002 Mar-Apr;30(2):199-203. 
- Garnett WR. GI effects of OTC analgesics: implications for product selection. J Am Pharm Assoc (Wash). 1996 Sep;NS36(9):565-72. 
- Orchard JW. Intrinsic and extrinsic risk factors for muscle strains in Australian football. Am J Sports Med. 2001 May-Jun;29(3):300-3.