Kayla Itsines

Kayla Itsines is an Australian personal trainer, author, and entrepreneur.

Kayla Itsines (born 21 May 1991) is an Australian personal trainer, author, and entrepreneur. She is the creator of a series of fitness ebooks titled Bikini Body Guides, and a meal-planning and workout app, Sweat with Kayla. Sweat with Kayla generated more revenue than any other fitness app in 2016.

In March 2016, Time named Kayla one of the 30 most influential people on the Internet, noting her success at leveraging social media to promote her brand As of October 2016, Itsines had eight million followers on Facebook and five-and-a-half million on Instagram. Her Facebook followers had liked her content 7.7 million times. In October 2016, Itsines and her partner Tobi Pearce were included in the BRW "Young Rich" list of the wealthiest Australians aged under 40 who had not inherited their money. Their fortune was reported at $46 million. Itsines is one of only two among the 2017 AFR's Rich List that are of Greek heritage.

In April 2015, Apple featured Itsines in an advertisement for the Apple Watch, demonstrating the heart-rate monitor feature of the product.

The release of the Sweat With Kayla app in November 2015 was met with an initial backlash from customers who had already paid for the BBG ebooks. Of the first 137 reviews of the app on the iTunes store, 93 gave it only one star, citing cost and usability issues. Itsines responded to these criticisms by reducing the price of the app to $1 for the first month to any of her existing BBG customers.

Itsines toured again in June 2016, visiting London, New York, and Los Angeles on the "Kayla Itsines Sweat Tour". Four thousand participants attended the New York class. In Los Angeles, attendees lined up for up to six hours to get a position close to the stage. After the class, Itsines stayed back for hours to meet-and-greet about one thousand participants.

In November 2016, Pan Macmillan published Itsines' first print book, The Bikini Body 28-Day Eating and Lifestyle Guide. In August 2017, she announced the upcoming publication of her second book, The Bikini Body Motivation & Habits Guide, which will be available for purchase in November 2017.

Itsines gave up drinking alcohol in 2011; she never drinks alcohol now and believes that nobody pursuing a healthy lifestyle should either. She attributes this stance to having lost an aunt to alcohol poisoning. Kayla also credits healthy habits as a way she is able to stay on track with her balanced lifestyle.