You Won't Believe Carrie Underwood's Low-Maintenance Workout Schedule

[MUSIC] Hi, I'm Kim with InStyle. I'm here with celebrity trainer Erin Oprea. And she's gonna show us today how to get legs like Carrie Underwood. Now, tell us a little bit about this move that we're gonna do. So today we're gonna do a squat into a curtsy lunge. You can do them with or without weights. I'm gonna show it real quick, and then it's your turn to try it out. Okay. All right, here we go. We're gonna go into a squat. And then take it right back into a curtsey lunge. And then back into a squat and into a curtsey lunge, okay? It's your turn.>>My turn.>>You wanna make sure you sit all the way back into your hips and then take it back. You wanna make sure this knee doesn't bow out when you go over to the side. Just keep it nice and tall, squat, curtsy. So you can do these without weights too. So just more effective with weights? Now let's go to the other side, down, now over. So how many reps do you recommend? 12 to 15. Of each side. Yeah, it's going to make your legs nice and pretty for those shorts. This burns, Erin. They feel great. It feels good! Yeah, it's fun. It's fun. And if you're just starting out, do you recommend not using weights at all, or using a lighter weight? Absolutely. In the beginning, start out with no weights. Okay. And then add them to it as they get easier. I like that move because it's super challenging in a short amount of time. And you can do it anywhere. No excuses. That's right. Thank you. And it burn. Thank you. You're welcome.

Carrie Underwood used to be a gym rat, but it seems like that's not the case any longer.

The singer opened up to E! on Thursday about how she fits physical fitness into her extraordinarily hectic life (she's got her own music, her family, and an active wear line to take care of), and we're taking notes.

"I used to work out six days a week," she said. "But now that's a little rare, sometimes it's one or two times a week and that just kind of has to be OK. And it is OK because whatever I'm doing that's keeping me out of the gym is important."

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We're happy to hear she isn't putting as much pressure on herself to keep up a six day workout schedule—because let's be real, that's a lot—but when she does hit the gym, she's got a great gym buddy to help her out: her husband hockey player Mike Fisher.

"Mainly, when we work out together, we're just working out in the same space," she said. "But I will say, the other day I was doing the ab wheel ... and later on that day, Mike said something like, ‘I'm not ready for the ab wheel yet.'"

If that wasn't cute enough, Underwood and Fisher's 2-year-old son Isaiah sometimes joins in the family workout fun, just like he did last March in the video below.

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Gym time as a family affair? We can get behind it.