The blonde woman was filmed exercising wearing a blue T-shirt, white socks and pink trainers – but it seemed as though she’d forgotten her leggings.
The clip was shared on social media leaving plenty of people stunned as she did her leg work out apparently naked.
Top Sports Gym shared the video on social media showcasing her workout.
But it was her trousers that sparked the most comments from people.
“She knows exactly what she’s doing,” one wrote.
“Welcome to skin gym an eye popping experience,” another added.
“Looks like you’re not wearing nothing, love it,” a third commented.
As someone else wrote: “She looks like she’s really in her skin.”
“Ooooh lord there for a minute, I thought,” another laughed.
“I had to do a double take,” someone else admitted.
“Took me a second,” another said.
At first glance it might look like the fitness junkie was naked – but it turned out she did have leggings on, they were just pink.
It seems the woman may have taken heed of the comments about her trouser choice.
Skin-coloured leggings have enjoyed a surge in popularity in recent months – especially for wearing to the gym.
Companies such as PUMA, Gymshark and Superdry have all created versions, which are big hits on their websites.
The clip posted to TikTok quickly wen t viral with over 10 million views and over 100k likes.