Intramuscular tendon injury is not associated with an increased hamstring reinjury rate within 12 months after return to play

Background: Acute hamstring injury that includes intramuscular tendon injury has been suggested to be associated with increased reinjury risk. These observations were based on a relatively small number of retrospectively analysed cases. Objective: To determine whether intramuscular tendon injury is associated with higher reinjury rates in acute hamstring injury. Methods: MRIs of 165 athletes with an acute hamstring injury were obtained within 5 days of injury. Treatment consisted of a standardised criteria-based rehabilitation programme. Standar