Erin Oprea

Celebrity trainer, former US Marine, and author; Erin Oprea has served as the personal trainer to some of the fittest names in music, including Kelsea Ballerini, Kacey Musgraves, Maren Morris, Tyler Hubbard, Brian Kelley, Lee Ann Womack, Martina McBride, and many more. A nine-year veteran of the U.S. Marine Corps, Oprea made history when she was appointed to lead the first female platoon attached to the infantry in a war zone. The fitness expert’s calorie-torching workouts have been featured on Good Morning America and E!, as well as in People, Women’s Health, Self, Vogue, Glamour, and more. Her revolutionary fitness and nutrition guide, The 4x4 Diet, is available now.