A Wellington woman says Les Mills wrongly accused her of defecating on the floor of a disabled bathroom, using her Crohn's disease as evidence.

The woman, who Stuff has agreed not to name, was kicked out of Les Mills after being accused of leaving poo on the floor. She had an agreement with the gym, which required she clean up after every trip to the bathroom. After a cleaner had to remove "matter" from the bathroom floor, her membership was terminated.

"This condition means I've been scapegoated for other people's mess," she said.

The suspension came after an ongoing feud with a Les Mills manager, focused on the woman's use of the bathrooms. Complaints included the noises she would make in the toilets and her use of the showers.

Her story became well known among gym regulars. A group of supporters at the gym protested Les Mills' handling of the issue, even complaining directly to chief executive Phillip Mills.

SUPPLIED Les Mills says a woman defecated on its floors, she says she's being "scaptegoated for other people's mess".

At least two people have left the gym in solidarity. Katy Young and Tanya Palmer, business consultants, found the woman "distraught" at the gym after she had been accused. The two consultants then began regular communications with Les Mills staff, saying they felt obliged to help a friend in need.

Palmer said the woman was unfairly treated and didn't have a chance to prove her innocence.

"We asked for a meeting with them and the response was to cancel her membership," Palmer said.

The woman at the centre of this acknowledged her condition could be "messy", but believed the allegations were nonsensical and ill-informed.

"The thing with my condition is, yes, it's messy, but if it was me to blame there would be blood and not poo in the middle of the floor."

In emails to the woman, staff and lawyers for Les Mills said it was a "health and safety" issue. They have declined to comment for this story.

A manager said cleaners complained about the woman's bathroom usage. In March, they reached a toilet use agreement to handle the situation. The woman would use two disabled bathrooms on the first and fourth floors of Wellington's Taranaki St Les Mills.

She agreed to clean up after each use, but told Stuff the rules were unnecessary and discriminatory.

"My main issue is that I was confined to a disabled bathroom. Someone technically disabled couldn't use it," she said. "People with Crohn's disease go through so much. I feel like Les Mills went out of their way to make things harder for me."

KEVIN STENT/STUFF Les Mills Extreme on Taranaki Street is the centre of a s... storm.

She said being kicked out of the gym was gutting, as fitness "was her life" and she had built a strong friend group after years of going to Les Mills.

People with Crohn's disease, which is genetic, often bleed or have diarrhoea when they go toilet. They need to use the toilet often and regularly feel abdominal pain.

The woman acknowledged the sound of her using the toilet was sometimes unusual. "One complaint was that I made 'horrific noises', there's nothing I can do about that. It's to do with my condition," she said.

Being forced to use a disabled bathroom was difficult, she said, because other people were often in it. People with Crohn's disease need to be able to quickly access a toilet.

Disabilities rights activists have called for legal requirements for businesses to provide toilets for anyone with these conditions. About 20,000 Kiwis are estimated to have Crohn's disease, and many say they are too afraid to leave the house in case they can't reach a toilet.

The woman complained to the Les Mills manager, but said her complaints only made the matter worse.

"I was put on a last chance warning, they said I had to stick with the disabled bathroom or have my membership ended," she said.

Needing quick access to a toilet, she said it was impossible to stick to the gym's request for her to only use the disabled bathroom. Out of fear of having her membership cancelled, the woman said she often ended up cleaning up other people's mess or using public toilets near the gym.

A lawyer representing the company, Rae Neild, said in an email that "a lot of people would like to help you but are unable to because of their statutory obligations".

Emails seen by Stuff showed Les Mills considered the woman to be an "infectious" risk.

Gym management agreed in March for the woman to stay if she followed a toilet use protocol. It said she would need to thoroughly clean each toilet after use and always wear a towel in the changing rooms, "so that future users and staff are not exposed to infection".

"You have indeed been using the self-contained toilets, but other agreed requirements have not been carried out," a Les Mills manager said in October.

The manager rejected that these issues were related to the woman's condition. Les Mills proposed to hold a meeting about the "matter" discovered in the toilet, but the woman said there was "no evidence to support the claims". The gym then terminated her membership.

On the date the "matter" was left on the bathroom floor, the woman told Stuff she was unable to use the bathroom – perhaps because it had been closed as the cleaners dealt to the incident.

In an email to management, a Les Mills cleaner said they had been told by another staffer the woman was the cause of the "matter".