Carrie Underwood Stands Up for Her Trainer Who Was Bullied and Shamed During a Workout

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Carrie Underwood took to Instagram on Tuesday to show support for her friend and fitness trainer, Erin Oprea, who was recently shamed and mocked for working out on the sidelines of her son's soccer game.

Oprea shared a screengrab of an Instagram pic posted by a stranger that showed her working out. The stranger mocked Oprea in the caption: "Would it be wrong of me to tell her that every day at the soccer field thinks her standing out front with her Jump rope for two hours only screams she wants attention."

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"So this happened last weekend!," Oprea captioned the screengrab, over which she wrote "Don't let others bully you!!" and had cropped out the man's name. "Get your workout in when you can and I sincerely hope you have supportive people around you!" she continued. "This didn't stop me, and I don't want it to deter you!!"

Later in the day, Underwood shared Oprea's post and cheered her friend on for standing up for herself.

"Way to go, Erin! Use someone else's negativity to help others," the 32-year-old singer and mother of one wrote.

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"That man obviously has a big problem...with himself," Underwood continued. "I only hope he can learn to like himself someday so he can be an adult and stop bullying others for bettering themselves!"

Recently, ET spoke with Oprea about how the Underwood got in perfect shape for awards season, where she looked absolutely stunning at the GRAMMYs. "It's hammering down on the cheat meals, cutting back, and buckling down," Oprea shared.

Clearly it's worked well for Underwood!

WATCH: Carrie Underwood Works Out With Adorable 5-Month Old Son Isaiah

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