Kayla Itsines

Fitness Experts

Kayla Itsines (born May 21, 1991) is a renowned Australian personal trainer, entrepreneur, and author who revolutionized digital fitness with her "Bikini Body Guide" (BBG) programs and the Sweat app. Starting as a trainer in Adelaide, she gained massive social media popularity by sharing client transformation photos. She co-founded the fitness empire Sweat, which was later acquired, and she continues to influence millions with her HIIT-based,, accessible workout approach.