Gracilis
The gracilis is one of the long adductor muscles.
Internal rotation of the hip
Semimembranosus muscle
Semimembranosus is the most medial of the three hamstring muscles. Chronically tight hamstrings are often a contributory factor to lower back pain and knee pain.
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Semitendinosus muscle
When running the hamstrings act eccentrically to slow down the knee extension motion. Hamstring strains are common in individuals with chronically tight hamstrings or who do not
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