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The hamstring muscles are shown to have a relatively high proportion of Type II fibers. Type II fibers are more involved with exercise of higher intensity and force production and it is postulated that the hamstrings are capable of high intrinsic force production. The ham strings are two-joint muscles and are, therefore, subject to increased stretch and force production extrinsically by motion at the hip and knee. It is proposed that high levels of tension in the hamstrings produced by intrinsic force production and extrinsic stretch may make them prone to injury in periods of intense muscular activity. This proposal is also relevant to other frequent athletic muscle injuries.<\/jats:p>","DOI":"10.1177\/036354658401200202","type":"journal-article","created":{"date-parts":[[2007,6,21]],"date-time":"2007-06-21T20:46:52Z","timestamp":1182458812000},"page":"98-103","source":"Crossref","is-referenced-by-count":226,"title":["Histochemical correlates of hamstring injuries"],"prefix":"10.1177","volume":"12","author":[{"suffix":"JR","given":"W.E.","family":"Garrett","sequence":"first","affiliation":[{"name":"Division of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.C.","family":"Califf","sequence":"additional","affiliation":[{"name":"Division of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"F.H.","family":"Bassett","sequence":"additional","affiliation":[{"name":"Division of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[1984,3,1]]},"reference":[{"key":"atypb1","unstructured":"Basmajian JV : Muscles Alive. 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