Any injuries incurred by the 134,570 recreational soccer players (aged 18-55 years) registered with the Spanish Football
Federation were reported to the federation’s medical staff. A standardized medical questionnaire, based on the Fe´ de´ ration International
de Football Association (FIFA) Medical and Research Centre (F-MARC) consensus for collection procedures in studies of soccer injuries, was used to classify the injury according to type, severity, location, and treatment.