HYROX is a relatively new fitness competition, created in 2017, that combines 8 km of running with performance at eight exercise stations.In this international survey of more than 400 HYROX competitors, half reported sustaining an injury the previous year during training; pain related to tendons in the lower extremities, with gradual onset, was the most common injury type.Many of these injuries were consistent with overuse, suggesting that competitors should adjust their training regimens to avoid excessive strain.

Half of participants in a new, increasingly popular fitness competition called HYROX said they had sustained an injury during training for it during the previous year, an international survey found.

Among 418 HYROX athletes from 30 countries and territories, 49.8% reported at least one injury they believed was related to their training in the past 12 months, according to Michael Zyskowski, PD Dr.med, of the Technical University of Munich, and colleagues.

The survey, administered earlier this year, also asked how much time respondents had spent in training, which added up to 177,000 hours. With 293 injuries reported in total, that worked out to a rate of 1.65 per 1,000 hours of training, the researchers reported in a manuscript posted to the medRxiv preprint server (which therefore has not yet been peer reviewed).