Popsugar Fitness Workouts The Best Workouts From Kayla Itsines's Sweat App Build Muscle, Get Stronger, and Improve Your Endurance With These 10 Sweat App Workouts October 4, 2020 by Tamara Pridgett View On One Page Photo 8 of 10 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 8 Kayla Itsines's 13-Minute Express Abs Workout Looking for more intense ab workouts? If so, you've got to try Itsines's 13-minute express abs workout from her new BBG Zero Equipment program. Previous Next Start Slideshow WorkoutsStrength TrainingKayla ItsinesKelsey Wells