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Section of Sports Medicine, Department of Orthopaedics, Karolinska Hospital, Stockholm, Sweden
Section of Sports Medicine, Department of Orthopaedics, Karolinska Hospital, Stockholm, Sweden
Section of Sports Medicine, Department of Orthopaedics, Karolinska Hospital, Stockholm, Sweden
Eleven sprinters with recent hamstring injuries were compared with nine uninjured runners. The flexibility of the hamstrings and the eccentric and concentric muscle torque were measured in the hamstrings and quadriceps muscles at different angular velocities. Sprinters with a previous hamstring injury had signifi cantly tighter hamstrings than uninjured sprinters had. The uninjured sprinters had significantly higher eccen tric hamstring torques at all angular velocities. They also had significantly higher concentric quadriceps and hamstring torques at 30 deg/sec but not at higher velocities. Sprinters with a history of hamstring injury thus differed from uninjured runners, being weaker in eccentric contractions and in concentric contractions at low velocities.
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