Medical Experts Explain Causes of Gastrointestinal Issues During Intense Races

Intense endurance races like HYROX can trigger runner's diarrhoea or faecal incontinence as high exertion redirects blood flow away from digestion toward muscles.

Medical professionals note that factors such as heat, dehydration, and high-fibre pre-race meals can increase gastrointestinal sensitivity during prolonged events.

Following an incident at the HYROX Beijing event, organizers updated rules allowing race directors to withdraw participants who pose contamination risks.