Victoria's secret models are finally revealing a big secret. How they get those picture-perfect bodies. Sometimes just weeks after giving birth. Abc's linsey davis tries out the workout that some of... See More
Victoria's secret models are finally revealing a big secret. How they get those picture-perfect bodies. Sometimes just weeks after giving birth. Abc's linsey davis tries out the workout that some of those models are using to get themselves runway ready. Reporter: It's the ultimate exhibition of precious little clothing, gigantic wings and a whole lot of heavenly bodies. Now, some of the victoria's secret angels are giving us a glimpse of what it takes to be toned and runway-ready. Models like hillary rhoda have taken to social media to show off their workout regimen. A recipe of flaxseed and acai powder. And bruised knuckles, following her preshow boxing workout. But the secret many of us want to know, how do those model moms get back on the runway so soon after giving birth? Surprisingly, the secret for some isn't found at the gym, on a treadmill, or even lifting weights. Some angels are simply taking a leap of faith. Mary helen bowers, a former dancer with the new york city ballet, trains clients using a low-impact, ballet-based fitness regimen. She spent a year working with natalie portman for her role in "black swan." And most recently, got lily aldridge back on the runway, just five months after giving birth to daughter, dixie. I can't imagine a better calling card. You know, the victoria's secret runway models, I train them. Lily aldridge just had a baby five months before. And then, she's hitting the runway. How did you do that? You focus on, you know, the areas you want to tighten up, especially after having a baby. Her waist and abs. And all through the legs and butt, of course. Her upper body, as well. Reporter: So, in the name of journalism -- check out my ballet moves. Bowers had me start my ballet one-on-one class on a mat, for low-impact stretching. Bowers says her average client does just 15 minutes. And often feel the different in two weeks. Two, three. Four. Good. Reporter: After 40 grueling minutes in bowers' studio, i have a lot more respect for all those angels. It's time for your wings. Reporter: The newest angel. I think you're totally ready to go. It looks great. Reporter: Eat your heart out,
This transcript has been automatically generated and may not be 100% accurate.