Match | Competitive or friendly match against another team |
Injury | Any physical complaint sustained by a player that resulted from a football match or football training and led to the player being unable to take full part in future football training or match play |
Hamstring injury | An acute onset distraction injury or gradual onset injury to the hamstring muscle group |
Recurrent injury | Injury of the same type and at the same site as an index injury occurring previously during the same season |
Early recurrence | Recurrent injury that occurs within 2 months after return to full participation from the index injury |
Injury incidence | No of injuries per 1000 player hours ((Σ injuries/Σ exposure hours)×1000) |
Injury burden | No of lay-off days per 1000 player hours ((Σ lay-off days/Σ exposure hours)×1000) |