On September 12, 2026, during the women’s pro division race at the National Speed Skating Oval in Beijing, Joanna Wietrzyk experienced bowel incontinence during the fourth functional workout station — the burpee broad jumps. She continued competing through the remaining running segments and workout stations, used shared equipment including rowing machines, sleds, sandbags, and ropes, and crossed the finish line first with a time of 1 hour, 1 minute, and 23 seconds. She won the race.

The footage and images that circulated online in the hours and days that followed produced one of the most significant controversies in the short history of Hyrox, sparked a global conversation about athlete welfare, competition officiating, and public health in shared sporting venues, and ultimately resulted in rulebook changes, an apology from the sport’s co-founder, Wietrzyk’s retroactive withdrawal from the race, and the termination of her partnership with Puma.

This post covers what actually happened, what the response revealed about how Hyrox operates, and what the rule changes mean for the sport going forward.

What Happened in Beijing

Joanna Wietrzyk is 22 years old, Australian, and the current Hyrox women’s Pro world record holder. She was competing in the Elite 15 division at the Beijing event, which ran from September 10 to 13 at the National Speed Skating Oval and drew more than 11,000 participants, making it one of the largest Hyrox events held outside Europe.

During the burpee broad jump station, the fourth of eight functional workout stations, Wietrzyk experienced an acute episode of fecal incontinence. The visible evidence of the incident was apparent in footage and photographs from the event. She did not step off the course. Hyrox officials did not intervene. She completed the remaining stations and running segments, finishing the race as the Pro Women’s champion by approximately 45 seconds over the second-place finisher, American Alyssa McElheny.

After the race, Wietrzyk posted a photograph to her Instagram story from what appeared to be a hospital bed with the caption “Go hard or go home … a win is a win.” The post was subsequently deleted.

The Response

The footage circulated rapidly on social media and drew criticism across multiple platforms. The concerns raised were specific and documented:

Other competitors reported slipping on the affected section of the track. Athletes in later heats used the same equipment — ropes, sandbags, rowing machines, sled handles, medicine balls — that Wietrzyk had handled after the incident. Hyrox officials did not remove the affected athlete from the race, did not isolate the affected area during competition, and did not alert other competitors to a potential contamination issue.

Hyrox China’s initial statement confirmed that affected areas were disinfected after the race concluded. The decontamination did not begin until after the event had finished and thousands of other participants had moved through the same spaces.

On Monday September 15, Hyrox co-founder Moritz Furste issued a public apology. “Hyrox made a mistake by not reacting immediately during the race,” he wrote. “I apologize to all that were directly or indirectly affected, as well as to everyone who felt like we did not handle the situation like we should have. In the end it is my job to foresee these potential incidents — and I did not.”

The statement confirmed that new rules and procedures had already been implemented. “As of this moment, there are new rules and procedures in place to prevent situations like this from happening again.”

What the Rulebook Gap Revealed

The specific organizational failure in Beijing was not primarily a failure of judgment by race officials. It was a failure of rulebook design. Hyrox China confirmed to the South China Morning Post that the global rulebook contained no provision allowing officials to remove an athlete for the circumstances seen in Beijing.

The 2026-27 Single Rulebook at the time of the incident included penalties for spitting or clearing the nose onto the floor, littering, and rapid cooling, with two-minute penalties or disqualification available to the Race Director for those infractions. Fecal contamination was not mentioned. Race officials had no clear written authority to remove an athlete from competition for this type of incident, and without that authority, they made the decision that most competition officials make when protocol is unclear: they did not intervene.

The updated rulebook, published by Hyrox on Monday September 15, added language stating that a Race Director may withdraw an athlete if their “blood, vomit, urine, or feces pose a welfare or contamination risk to the racer or to other racers.” That provision now exists. It did not exist on September 12.

Hyrox China also submitted proposals to Hyrox headquarters for new regulations governing track management, race intervention, and result determination in cases involving “extreme physical distress and venue public health risks.”

Wietrzyk’s Response

On Thursday September 18, Wietrzyk published a formal apology on Instagram.

“I want to offer my sincere apology to the people of China, my fellow competitors, the spectators and the Hyrox organizers for what happened during the race in Beijing,” she wrote. “I felt completely fit and healthy at the start of the race, with no reason to expect any illness. Looking back, I regret the decision to not have stepped off the track. I recognize that I should have made a different choice. I take responsibility for my decision to continue and am deeply sorry for the discomfort and disruption it caused.”

Wietrzyk announced she was retroactively withdrawing from the race and forfeiting the points she had earned. She said she would be “taking some time to recover, reflect and look after myself and my family away from the noise.”

Puma, her brand partner, subsequently removed her retail line.

Hyrox China refunded entry costs to more than 1,000 participants affected by the incident.

What This Means for Hyrox as a Sport

The Beijing incident exposed a specific tension at the center of Hyrox’s growth model. The sport has expanded from a niche fitness challenge, founded in Hamburg in 2017, to a global competition format with more than 1.4 million participants worldwide. That growth has been built partly on a culture of extreme effort, the brand regularly celebrates athletes who push through physical limits, and on a format that is genuinely accessible — more than 98 percent of Hyrox competitors complete the race regardless of fitness level.

The tension is between those two things. The “go hard or go home” culture that makes Hyrox compelling also creates the conditions in which an elite athlete makes the decision Wietrzyk made on September 12. And the mass participation format that makes Hyrox accessible means that the same course and the same equipment are shared by 11,000 people, with later heats moving through spaces where earlier heats have competed.

The rulebook change addresses the officiating gap. It does not resolve the cultural question of what elite competition in a mass participation format should look like, or where the line between competitive mentality and responsibility to other competitors falls.

The Physiology of GI Distress in High-Intensity Competition

For anyone training for Hyrox or similar hybrid events, the physiological context for what happened in Beijing is worth understanding, not to excuse the decision to continue but to understand why gastrointestinal distress is a genuine and documented risk in high-intensity endurance and hybrid events.

During high-intensity exercise, blood is redirected away from the gastrointestinal tract to working muscles and the cardiovascular system. This reduction in splanchnic blood flow — sometimes by as much as 80 percent during maximal effort — compromises the gut’s normal function. The result is a range of GI symptoms that are well documented in endurance and high-intensity sport: nausea, cramping, diarrhea, and in severe cases, fecal incontinence.

The risk is higher in events that combine running with functional work — exactly the Hyrox format — because the mechanical jarring of running accelerates gut motility at the same time that reduced blood flow is already compromising gut function. Elite athletes competing at maximum effort are physiologically more vulnerable to GI incidents than recreational athletes competing at comfortable paces, which is one reason the incident involved the Pro Women’s winner rather than a mid-pack finisher.

Managing this risk requires specific nutrition and hydration protocols in the 24 to 48 hours before competition — the same period covered in hybrid fueling and nutrition guidance for high-intensity events. High-fiber foods, high-fat foods, and unfamiliar foods in the pre-race window all increase GI risk. Adequate hydration reduces it. The specific pre-race nutrition protocol matters more for high-intensity events than for steady-state endurance events precisely because the splanchnic blood flow reduction is more severe.

What Happens Next

Hyrox has stated that new rules and procedures are in place. The updated rulebook gives Race Directors clear authority to withdraw athletes for contamination risk. Hyrox China has proposed additional changes to track management and result determination protocols.

What the sport has not yet addressed publicly is the cultural question that the incident made visible. The creatine and performance optimization conversation that surrounds elite Hyrox competition is part of a broader picture of athletes pushing physiological limits in pursuit of competitive outcomes. Where the organizational responsibility lies when those limits produce outcomes that affect other competitors is the question the Beijing incident raised and the rulebook change only partially answers.

Wietrzyk is a 22-year-old world record holder who made a decision under extreme physical duress that she has since acknowledged was wrong. The abuse directed at her online — which Hyrox explicitly condemned in their statement — is disproportionate to the situation and does not serve anyone. The organizational failures that allowed the situation to develop and continue are more properly the subject of scrutiny than the individual athlete whose decision to continue was enabled by an absence of rules requiring officials to intervene.

The rulebook now has those rules. The Beijing incident is what it took to get them there.