Erin Oprea poses for a photo at the ACM Workout For A Cause: with News Photo - Getty Images

22,406 Rockin Stock Photos, High-Res Pictures, and Images - Getty Images

Fitness guru Erin Oprea joined with Kelsea Ballerini for a workout

4,398 Denise Long Photos & High Res Pictures - Getty Images

Get fit in 25 minutes with this full-body HIIT workout

Fitness guru Erin Oprea joined with Kelsea Ballerini for a workout

Erin Oprea - Life Takes Balance

Erin Oprea & Kelsea Ballerini Sweat It Out For ACM Lifting Lives - Country Music Pride

Academy Of Country Music Awards Entertainment and Celebrity Photos Gallery - Getty Images

Celebrity Trainer Erin Oprea: Arm Exercise Your Workouts Been Missing

Celebrity Trainer Erin Oprea poses for a photo at the ACM Workout For News Photo - Getty Images

10,938 Denise Black Photos & High Res Pictures - Getty Images

Kacey Musgraves' Trainer Erin Oprea on Singer's Workout Playlist

Kacey Musgraves' Trainer Erin Oprea on Singer's Workout Playlist

Kacey Musgraves' Trainer Erin Oprea on Singer's Workout Playlist

Erin Oprea (@erinoprea) • Instagram photos and videos