Professional Hyrox athlete Joanna Wietrzyk gained widespread attention after an incident during a competition in Beijing, where she continued competing despite experiencing bowel incontinence. Videos circulated on social media showing visible fecal matter on her clothing and equipment as she completed the high-intensity challenges.

Wietrzyk, a 24-year-old Australian and the current Hyrox world record holder, was taken to a hospital in Beijing following the event, which she won. Despite the distress of onlookers and fellow competitors regarding the potential biohazard, Wietrzyk expressed no regrets from her hospital bed, posting on Instagram, "Go hard or go home they say... a win is a win." She has since removed the post and disabled comments on her social media.

The incident has led to criticism of the event organizers, who have apologized for their delayed reaction. Hyrox co-founder Moritz Fürste stated, "Hyrox made a mistake by not reacting immediately during the race. In the end, it is my job to foresee these potential incidents – and I did not." The organization has vowed to change the sport's rules.

Hyrox, a fitness sport that combines eight 1km runs with eight functional workout stations, has seen rapid global growth. Founded in Germany nearly a decade ago, it attracts participants seeking a high-energy, individual challenge within a community setting. In 2026, over 100 global events are scheduled, with some drawing up to 40,000 participants.

Wietrzyk, who previously competed in national tennis and netball, entered the Hyrox circuit in 2024 and quickly rose to elite ranks. She holds the world record for the fastest Hyrox completion, set in Warsaw in April with a time of 54 minutes and 25 seconds. Her athletic background includes playing for the Ariels in the Victorian Netball League in 2023 and studying a Bachelor of Commerce at Deakin University. She is sponsored by brands such as Puma and The Feed.

Social media reactions have been mixed, with some criticizing the perceived 'win at all costs' mentality in the sport, which Wietrzyk has previously alluded to in interviews. The incident in Beijing has raised concerns about biohazards and safety protocols at indoor Hyrox events, contrasting with occasional similar incidents in outdoor marathons. A 'major clean-up operation' was conducted at the Beijing venue, including sanitizing carpets and equipment.