The fact that Carrie Underwood works out isn't news.

But she did recently reveal to People that she is a little quirky about her workouts now. Like how she runs when it's hot outside.

"I love just putting headphones in and going for a run. I feel so good when I get home, especially when it's hot. I'm one of those weirdos that likes to run when it's super hot outside," Underwood admitted (this week's Nashville forecast for a string of 85-degree days must be good news for her).

And Underwood also said that when she goes to group exercise classes, her inner competitive streak comes out.

"I find myself competing with other people in the room. I'm like, 'Oh she's good, I want to be like her!' I try to 'beat' someone in the class," she said.

"They have no idea we're competing!"

Ultimately, for Underwood, exercising isn't about looking good for other people. It's just about feeling good, for herself and her husband Mike Fisher and their son Isaiah.

"No bad things can come out of taking care of yourself," she said.