Risk factors for hamstring muscle injury in male elite football: medical expert experience and conclusions from 15 European Champions League clubs.

Objectives: To describe the perceived importance of suggested hamstring injury risk factors according to chief medical officers (CMOs) of European male professional football clubs. A secondary objective was to compare if these perceptions differed between teams with a lower-than-average hamstring injury burden and teams with a higher than average hamstring injury burden.

Methods: First, CMOs of 15 European professional male football clubs were asked to suggest risk factors for hamstring injury in their club.