About
Kayla Itsines is an Australian personal trainer, author and entrepreneur who built a global fitness brand around her Bikini Body Guides. She co‑founded the Sweat app to deliver high‑intensity workouts to a community of millions of women. Based in Adelaide and now living on the Gold Coast, she is one of the most followed fitness influencers on Instagram.
Key facts
- Kayla Itsines co‑founded the Sweat fitness app (originally "Sweat with Kayla") to host her BBG and other workout programs.
- Her Bikini Body Guides e‑book, launched in 2014, is a 12‑week, 28‑minute high‑intensity program that has sold over one million copies worldwide.
- Her Instagram account @kayla_itsines has more than 15.6 million followers as of early 2026.
- Time Magazine named her one of the 30 most influential people on the internet in 2016.
- Partner Tobi Pearce served as CEO of Sweat and helped transition the BBG e‑book into a mobile app.
Brands
Sweat
Co‑founded by Kayla Itsines as a fitness app and community delivering her workout programs
Sweat with Kayla
Original mobile app created by Kayla Itsines to host BBG and other workouts
Bikini Body Guides (BBG)
Signature e‑book series created by Kayla Itsines in 2014
High Intensity with Kayla
Rebranded version of the BBG program developed by Kayla Itsines
Low Impact with Kayla
Low‑impact workout program launched by Kayla Itsines
Post-Pregnancy program
Post‑pregnancy fitness program created by Kayla Itsines
BBGgirls
Online community of followers of Kayla Itsines' BBG program
Sweat community
Global community of users on the Sweat app curated by Kayla Itsines
People
Tobi Pearce
Partner and CEO of Sweat who helped turn the BBG e‑book into a mobile app
Jim
Kayla Itsines' father, a teacher who encouraged her education
Anna
Kayla Itsines' mother, a teacher who supported her early career
Publications
Forbes
Featured Kayla in a profile of her fitness business
Business Insider
Published an article profiling Kayla Itsines' rise to Instagram fame
Time Magazine
Named Kayla one of the 30 most influential people on the internet in 2016
Bloomberg
Included Kayla in coverage of top fitness influencers
Daily Mail
Reported on controversy surrounding Kayla's 2014 BBG calorie recommendations
9Honey
Conducted an interview with Kayla about her BBG and Sweat business
The Influencer Marketing Factory
Listed Kayla among the top influencer‑founded fitness brands
The Tiger News
Published a profile describing Kayla as an Instagram fitness influencer
Castmagic.io
Hosts a creator profile for Kayla Itsines highlighting her fitness expertise
Pixelforce
Produced a case study on the development of the Sweat app with Kayla
Generation Iron
Featured Kayla in an article about her training routine and business
The Nightly
Interviewed Kayla about her multiple business ventures beyond fitness
Get Ahead
Conducted a street‑chat interview with Kayla near her Gold Coast home
Other
Instagram
Kayla shares fitness content on @kayla_itsines, amassing over 15.6 million followers
YouTube
Kayla runs a YouTube channel featuring workout videos and bootcamps
TikTok
Kayla posts short‑form fitness content on @kayla_itsines
Twitter
Kayla maintains a Twitter presence @kayla_itsines
World Tour London bootcamp
Kayla hosted a live bootcamp in London, documented on YouTube
Sweat.com
Official website for the Sweat fitness app founded by Kayla Itsines