Kayla Itsines has achieved immense success with her two BBG guides, which have been downloaded over one million times.
Itsines' BBG program is based on 28-minute high-intensity workouts that are to be completed three times per week.
In 2015, Kayla embarked on a world tour, the "Kayla Itsines Bootcamp World Tour," leading free group fitness classes around the world.
Kayla took legal action in 2015 against another Adelaide-based personal trainer over comments they made about her BBG program.
In February of 2015, Apple featured Kayla Itsines in an advertisement for the Apple Watch.
In November 2016, Pan Macmillan published Itsines' first print book, The Bikini Body 28-Day Eating and Lifestyle Guide.
Kayla's second book, The Bikini Body Motivation & Habits Guide, was released in August 2017.
Kayla keeps her social media posts focused on her followers and their fitness journeys rather than herself.
Kayla is careful of how she is represented visually by other publications and will turn down photo shoots that don't align with her image.
Kayla never promotes something in which she does not personally believe, poses provocatively or sexualises herself, or post advice that is relevant only to her own lifestyle.
Kayla is the only person who posts on her social media accounts.
As of 2018, Kayla Itsines' wealth is estimated at $63 million.
Kayla's BBG program has helped thousands of women achieve their fitness goals and gain self-confidence.