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Kayla Itsines

Australian personal trainer, Sweat co-founder and author helping women build strength and confidence through high-intensity, strength, pregnancy and post-pregnancy workouts.

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Kayla’s happenings, collected from public sources, plus their backstory and Starbook, where fans write.

Known for

Overview

From: Adelaide, South Australia
Work: Personal trainer, fitness entrepreneur and author
Training since: Certified personal trainer since 2008
Breakout: BBG workout guides and an Instagram community sharing their progress
Sweat: Co-founded in 2015; sole owner since March 2026

Mini bio

How it started.

Kayla began building her training career in Adelaide, working with women in backyards, at the beach and in a women-only training centre. She has been a certified personal trainer since 2008. Sharing her life and her clients’ progress on Instagram brought requests from women who wanted to train with her from afar.

The BBG breakout.

Those requests became a PDF: a 12-week program with three 28-minute workouts each week. The Bikini Body Guide spread through an online community sharing its progress. Kayla went on to lead bootcamps around the world and co-founded the Sweat app in 2015. The original guide lives on there as OG Kayla.

Beyond the original guide.

Kayla published healthy eating and lifestyle books in 2016 and 2017 and expanded her training options to include low-impact, pregnancy and post-pregnancy workouts. More recently, her own focus on strength training shaped Strength with Kayla and Strength In 30. In March 2026 she announced sole ownership of Sweat.

Creditschronological, newest first

Training programs

2026Strength In 30Trainer and program creator
2025Strength with KaylaTrainer and program creator

Books

2017The Bikini Body Motivation and Habits GuideAuthor
2016The Bikini Body 28-Day Healthy Eating & Lifestyle GuideAuthor

Fitness platforms

2015SweatCo-founder and head trainer

Awards

TIME’s 30 Most Influential People on the Internet2016 · Included in TIME’s unranked list for her impact through workout guides, Instagram and the Sweat with Kayla app.

Quotes

I see recovery as part of your training.Kayla Itsines, JDEED interview, 19 October 2026

On making room for rest and recovery alongside workouts. Source: https://www.jdeedmagazine.com/news/kayla-itsines-siro-ambassador-exclusive-interview

Trivia

The BBG name came from the Bikini Body Bootcamp where she had worked. Her community shortened Bikini Body Guide to BBG.
Her earliest backyard sessions involved a whiteboard, long before an app delivered the workouts.
She is an Endometriosis Australia ambassador and first shared her own endometriosis story publicly in 2021.
Her second book drew on more than 40,000 survey responses from her online community.