'EXCLUSIVE: Why Jessica Alba and Allison Williams Swear by Trainer Kayla Itsines\' 28-Minute Workout'

'ET found out how Instagram\'s most famous trainer is inspiring people to get fit with her 28-minute bikini body workout.' 

Tags: News , entertainment news , 2016 , Entertainment Tonight , etonline , et online , et , ETtrending , etnow

• lifting
• Bikini
• 30 minute workout
• coreografia
• B.P.ED
• legs
• yoga for beginners
• bicep
• Women
• oefitness