As mentioned previously, the hamstring muscle group are the most commonly injured in soccer. The hamstrings comprise of three muscles – the Biceps Femoris, Semitendinosus and Semimembranosus.

Recurrence is a particular danger with hamstring injury. Like all muscle strains, hamstring strains heal with scar tissue and this tissue is never as extensible as the original muscle tissue. Having a previous hamstring injury means that the player has a greater chance of sustaining another hamstring injury as there can be a structural deficit in the tissue. If a player also has one or more of the risk factors mentioned above, then the chances of re-injury increase. For example, Ryan Giggs (Manchester United), Gonzalo Sorondo (Crystal Palace), Chris Riggott (Boro) Patrick Kluivert, Nicky Butt and Kieron Dyer (Newcastle United) suffered recurrent hamstring injuries which tend to skew the overall data.

Total
days lost due to reported muscle injuries >
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