Highlights For both ultramarathoners and non-ultramarathoners, the knee and ankle regions had the highest incidence proportion of injuries. There was no significant difference in injury incidence proportions by anatomic location between ultramarathoners and non-ultramarathoners. For non-ultramarathoners, ankle sprains were in the top 5 injury incidence proportions but were not in the top 5 injury prevalence proportions. Achilles tendinopathy and medial tibial stress syndrome had the highest incidence proportions in non-ultramarathoners. Anterior compartment syndrome, patellofemoral pain syndrome and Achilles tendinopathy had the highest incidence proportions in ultramarathoners.

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