Joanna Wietrzyk Wins Her Hyrox Return, Weeks After Food Poisoning Hit Mid-Race

On Friday evening in Hamburg, the city where HYROX was founded, Joanna Wietrzyk finished her wall balls, the last of eight stations, and crossed the line first in 56 minutes and 10 seconds. It was her first race since Beijing in September, the race the internet still asks about by name. We read the posted results, her first interview since that day, the statement she published the week after it, and the research on what food poisoning and hard racing do to a gut at the same time.

The short version: she won, she has now said in her own words what happened in Beijing, and her account lines up with a piece of digestion most people never think about. Bacterial food poisoning does not announce itself at the meal. It can arrive hours or days later, and a race is one of the worst places for it to land. Below: the result, what she said, and the plain science of why someone can feel fine at the start line and not at halfway.

The result: A 14-second win in the first Elite 15 race of the season

HYROX Hamburg opened the 2026–27 Elite 15 Series, according to ABC News in Australia. In the women’s race, Wietrzyk finished in 56:10, the American Lauren Weeks in 56:24 and Vivian Tafuto in 57:55, according to the results printed by BoxRox and The Barbell Spin on October 30. By the posted times, that is a 14-second margin (our arithmetic; BoxRox lists the gap as 15 seconds, likely from unrounded times).

The format matters for what follows. A HYROX race is a 1-kilometre run followed by one workout station, repeated eight times, according to HYROX’s own race page: a ski machine, a sled push and a sled pull, burpee broad jumps, rowing, a farmers carry, sandbag lunges and wall balls, with 8 kilometres of running in between. For an elite woman it is just under an hour at close to full effort. BoxRox noted one fuelling detail from Friday: Wietrzyk took her first energy gel after the sleds.

In her words: She told the BBC it was food poisoning, and that it came on halfway

Wietrzyk, 24, spoke to the BBC in an interview published late on October 29, the day before Hamburg. The BBC reported that she said she had suffered a bacterial infection from food poisoning, and that she went into the Beijing race on September 12 “feeling fresh, feeling really, really good.” “It was a very sudden experience,” she told the BBC. “It wasn’t until about halfway through the race where everything did transpire.”

That matches what she wrote the week after the race. In the Instagram statement in which she apologised and forfeited the result, she said she “felt completely fit and healthy at the start of the race, with no reason to expect any illness,” as reprinted by The Tab on September 17. In the same statement she said she had decided “to retroactively withdraw from the race and forfeit the points I earned.”

She did not soften the decision to keep going. “It was my decision to continue racing so I take full responsibility for that,” she told the BBC, and “Obviously I did put other people at risk.” HYROX has since added a clause to its rulebook that lets a race director withdraw an athlete on medical grounds when blood, vomit, urine or faeces pose a welfare or contamination risk, which we covered in September.

She also said she was “nervous” about racing again, and that she did not want Beijing to define her: “I don’t want it to become my identity.” Then she went and won.

The delay: Why food poisoning can wait until you are already racing

The part of her account that surprises people, feeling well at the start and not at halfway, is ordinary for food poisoning. The CDC’s table of food poisoning symptoms lists how long each common germ takes to cause illness after the food is eaten: 6 hours to 6 days for Salmonella, 2 to 5 days for Campylobacter, 3 to 4 days for E. coli, and 12 to 48 hours for norovirus, which is a virus rather than a bacterium. Diarrhoea, stomach cramps, nausea, vomiting and fever are the common symptoms, the CDC says.

Our reading: a window that long means the meal and the moment rarely feel connected. The germs need time to multiply and irritate the lining of the gut before anything is felt, so a person can eat something on one day, train or travel normally, and feel the effects in the middle of something else entirely. Wietrzyk has not said what she ate or which germ it was, and we do not guess.

The race: Hard exercise already takes blood away from the gut

Racing makes a sensitive gut more sensitive. During hard exercise the body moves blood away from the stomach and intestines and toward the working muscles. With enough intensity or duration, blood flow to the gut can drop by 80 percent or more, according to a 2012 review in Alimentary Pharmacology & Therapeutics by Rinze ter Steege and Jeroen Kolkman of University Medical Centre Groningen (PMID 22229513). The same review puts the share of people who get gut symptoms during exercise as high as 70 percent.

Less blood means a gut that empties more slowly, absorbs less and moves things along unevenly. A 2017 systematic review led by Ricardo Costa at Monash University in Melbourne, Wietrzyk’s home city, named the pattern exercise-induced gastrointestinal syndrome, and found that the disturbances grow with intensity and duration and are worse in heat and in running (PMID 28589631). In a 2014 review in Sports Medicine, Erick de Oliveira, Roberto Burini and Asker Jeukendrup put the share of athletes with gut complaints at 30 to 50 percent, most of it mild (PMID 24791919).

Put the two together and, in our reading, the halfway mark is no mystery: a gut already irritated by an infection, asked to work with a fraction of its usual blood supply, at close to maximum effort. Even healthy athletes who are not ill train their guts for race day. In a Monash trial of 18 endurance runners, two weeks of practising with carbohydrate during runs reduced gut discomfort and nausea in the later test (PMID 28508559). That is why details like the timing of one energy gel get noticed.

The everyday version: What this means for a weekend race

Most people who line up for a HYROX, a marathon or a park run will never face what happened in Beijing. The useful takeaway is smaller: a stomach bug can start after the start gun, and the body under race effort has less room to cope with it. The ter Steege and Kolkman review lists the basics that help the gut in hard exercise generally: lower intensity, avoid dehydration and avoid very concentrated drinks. The CDC advises plenty of fluids with diarrhoea or vomiting, and lists signs of dehydration such as passing little urine, a dry mouth and throat, and dizziness on standing.

Wietrzyk’s next race is the Elite Series event in London from December 3 to 6, according to ABC News. “There is more to life… than just racing and just winning,” she told the BBC before Hamburg.

How we checked this: Sources and method

Her words come from the BBC interview published on October 29, 2026, and from her September Instagram statement as reprinted by The Tab on September 17, 2026. We used only what she said in public, and we name no germ because she did not. The Hamburg times come from the results printed by BoxRox and The Barbell Spin on October 30, 2026; the season and next-race details from ABC News on October 31; the race format from HYROX’s own page. Incubation times come from the CDC’s food poisoning symptoms page. The science comes from PubMed: PMID 22229513, 24791919, 28589631 and 28508559, each matched to its title. The 48 days and the 14-second margin are our arithmetic. This article is educational, describes what the cited sources say, and is not medical advice.