Sydney man 'wins Halloween' as he dresses up as Hyrox pooper Joanna Wietrzyk who sparked worldwide outrage after continuing race covered in faecal matter

A Sydney man recreated the shocking HYROX incident for Halloween over the weekend with a costume that left his Instagram followers in stitches.

Micro influencer Jack Jones swapped the usual vampires and zombies by going as Australian athlete Joanna Wietrzyk, who suffered sudden bowel incontinence during a HYROX race in Beijing in September and continued competing.

His outfit consisted of tiny black shorts, a prop barbell and brown streaks smeared down his legs.

The message on his cropped black T-shirt read: 'A win is a win' - a nod to Wietrzyk's initial social media response to the Beijing incident which sparked further outrage. 

The Sydney reveller committed to the athletic theme with a black headband, grey crew socks and chunky black trainers.

He slung an oversized black prop barbell across his shoulders, with each end optimistically labelled '1000 LBS'.

In one photograph, he dropped into a deep squat on the footpath, smiling at the camera with the slogan on his shirt clearly visible.

Another showed him performing a lunge beside a tree, while a third captured him glancing back over his shoulder to reveal the full extent of the costume's deliberately grubby detailing.

There were no actual race results to speak of, but his followers were ready to hand out the Halloween honours.

'Stay right there. I'm calling the police,' one commenter joked.

'You're the f**king best! I love this!' another wrote.

A third appeared more impressed by his sporting potential than his costume, commenting: 'The best part of this is that you would literally smash a Hyrox race without even trying'.

Others responded with laughing emojis and praise. 

Wietrzyk faced widespread criticism after the Hyrox incident which prompted debate about hygiene, athlete welfare and the decision to allow her to continue using a shared competition course. 

HYROX co-founder Moritz Fürste subsequently apologised and announced changes to event procedures and the rulebook.

'Of course, we have already started improving event processes and making changes to the rulebook. As of this moment, new rules and procedures are in place to prevent situations like this from happening again,' he said.

'We learn and try to get better every day.'

HYROX is a fast-growing extreme fitness competition in which athletes alternate between running and exercises such as burpees, lunges and sled pushing.

It has surged in popularity in recent years, especially among ageing millennials and office workers, and now stages events around the world.

The challenge combines eight 1 km runs with eight workout stations, requiring competitors to alternate running with exercises including sled pushes, rowing, weighted carries and sandbag lunges.

HYROX China said affected areas and race lanes were immediately closed and isolated before being thoroughly disinfected following Wietrzyk’s accident.

The clean-up included sanitising equipment and replacing sections of carpet. 

Wietrzyk has since returned to competition, winning the women's Elite 15 event in Hamburg on Friday.