One in four trail running race entrants sustained an injury in the 12 months training preceding the 2019 SkyRun race

Objective: To determine the epidemiology and clinical characteristics of RRIs among trail runners who entered the 2019 SkyRun races. Design: Descriptive cross-sectional study. Setting: 2019 SkyRun races. Participants: Consent for data analysis was given by 305 of 412 (74%) race entrants. Main outcome measures: Retrospective annual incidence (RRIs/1000 h), point prevalence (%), frequency (%), characteristics (anatomical region, body area, tissue type, pathology type) and injury severity (mean severity score; 95% CI) of RRIs. Results: 28.2% of participants reported at least one RRI. The retrospective annual incidence was May 49, 1000 h and the point prevalence was 1.3%. Most injuries occurred in the lower limb (87.3%), with the knee (26.5%), ankle (21.6%), and foot (16.7%) reported as the most frequently injured body areas. Muscle/tendon accounted for 44.1% of tissue type injuries. Tendinopathy (27.5%), joint sprain (19.6%), and muscle injury (15.7%) were the most common pathology types reported. The mean injury severity score was 31.6. Conclusions: One in 4 trail runners reported at least one RRI in the 12 months leading up to a race. RRIs mostly affected the lower limb specifically the knee, ankle and foot. Future research should establish injury risk factors to ultimately develop specific injury prevention strategies.