Maren Morris welcomed son Hayes only two months ago, but according to her trainer she’s already working out.

“We are back to training again and I’m so proud of her,” Erin Oprea tells “Us Weekly. “She worked up until basically the day, I think we trained like a day or two before she had the baby. And then we’re back at it.”

Oprea calls Maren a “riot,” sharing, “I love that girl. She’s just a cool person. Just a good person.”

The trainer notes she’s not pushing Maren to lose the weight, and instead is trying to get her to just “stay healthy.” She explains, “so I really want her to enjoy the journey and not stress over it because one, there’s not an end date. So I was, like, let’s just kind of enjoy this time while working towards feeling our best.”

Source: Us Weekly