Kayla Itsines smashes five Guinness World Records in one day

The "army", a term social media coined for her followers via a group fitness class, are now the proud owners of records for "the most people to perform squats", "the most people doing sit-ups simultaneously", "the most people performing lunges", "the most people performing star jumps" and "the most people running in place simultaneously".

"Working as a team to not just achieve our fitness goals but also to break these records really proves that we are the largest and most influential fitness community in the world," Itsines said.

The records cap off a great year for Itsines.

​Earlier this year she conducted sellout boot camps in the US and caught the attention of The New York Times.

"Ms Itsines' seemingly genuine could-be-any-girl image is tightly controlled. Between sales of her guides, her foam rollers, her water bottles and her recently released app, she's almost certainly much wealthier than your average 24-year-old (or your average anyone), but she won't confirm even how many employees her company has besides her and Mr Pearce [Itsine's fiance Tobi Pearce]," the story titled "Kayla Itsines Is Winning Instagram Followers, One Ab Post at a Time" stated.

Back home she made her debut on the BRW Young Rich list, only one of eight women to do so, thanks to the $46 million fitness and social media empire she created on the advice of Pearce back in 2014.

She also has taken steps to make her 28-minute high-intensity workout program, already road tested by 10 million women, more inclusive by ensuring the $69 "Bikini Body Guide" is focused on positive body image, health and movement.