“For competitions abroad, I normally spend approximately £400 per trip for two nights’ stay and travel and £120 for a ticket,” she adds.

As she is racing so much, she says she needs lots of fitness kit too, adding that “I burn through ridiculous amounts of shoes.”

Evgenia Koroleva, the founder of ONE LDN gym, says for anyone that takes fitness competitions seriously, “the costs can be absolutely astronomical”.

She estimates an athlete travelling to compete in a Hyrox competition will spend between “£500 to £1,000” in one weekend, with the ticket alone about £120.

“Hyrox has created this addiction for people who do it because they never really do one race. When they do their first race they then sign up for another one and because the course is the same it creates this level of competition with yourself,” she adds.

The cost of participation is higher than a marathon, and some people have criticised it. “Travelling abroad plus the costs involved to run around a bit and get out of breath is a stretch for me,” said one former participant on Reddit.

Fran Sirl, personal trainer and owner of parkfit, who runs outdoor fitness classes in Richmond Park, says sports like this can feel intimidating and says he reminds his clients you don’t need specialist kit or equipment to get fit.

“I take groups out into the park. Sometimes we start out with a walk, then add lunges and push-ups on a bench.

“Exercise doesn’t need to be expensive or complicated. It’s about finding something that makes you want to go back and do it again, whether that’s a high intensity workout or just going for a walk.”

Most athletes the BBC spoke to felt the prices for Hyrox were fair due to the cost of hiring large event spaces, specialist equipment and judging panels.

Evgenia says the fact people are willing to pay so much reflects a wider “cultural shift” in how much people in their 20s and 30s spend on exercise.

“Exercise is non-negotiable and part of their identity,” she adds.

Spending money on fitness is a priority for those born between 1997 and 2012 (Gen Z), according to exercise app Strava., external

Its survey suggests that a third of them plan to spend more on fitness this year with almost two thirds saying they would rather spend money on new gym clothes than a date.

“Mara-cations” (marathon vacations) and Hyrox holidays are now so popular that some travel companies are offering bespoke trips abroad for competitions.