Tight hamstrings syndrome.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D009119:Muscle Contraction; D009135:Muscular Diseases / Q000209:etiology / Q000473:pathology / Q000503:physiopathology / Q000628:therapy; D010146:Pain / Q000209:etiology; D013577:Syndrome; D013848:Thigh