Lew Robertson/Getty; Inset:Courtesy Lisa Lillien
Lisa Lillien is the author of the popular Hungry Girl website and email newsletter, featuring smart, funny advice on guilt-free eating. She is also the author of nine books, six of which debuted at number one on the New York Times Best Sellers list. Read her blog every Monday for slimmed-down celebrity recipes and more.
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As a former U.S. Marine, Erin Oprea is dedicated to fitness. Now a Nashville-based personal trainer with clients like Carrie Underwood, she uses her expertise to help those with busy lives stay fit. Visit her site or follow her on Twitter @erinoprea. Then come back to PEOPLE.com every Thursday to master a new workout move.
Harley Pasternak is a celebrity trainer and nutrition expert who has worked with stars from Halle Berry and Lady Gaga to Robert Pattinson and Robert Downey Jr. He’s also a New York Times best-selling author, with titles including The Body Reset Diet and The 5-Factor Diet. His new book 5 Pounds is out now. Tweet him @harleypasternak.
You don’t have to be a yoga girl to quiet your mind during the day — but it doesn’t hurt to take some advice from someone who is.
Meet Rachel Brathen, an Aruba-based yoga instructor who has amassed more than a million followers on Instagram with her inspirational (and enviable) images of pretty poses and Caribbean calm.
Courtesy The Edit
Even Kate Upton allows herself a cheat day!
“I am healthy, and I do work really hard, and I want to be a positive role model in that way,” the model, 22, tells Net-A-Porter’s The Edit. “What I’ve learned is that it’s about putting the right fuel in your body and treating your body well. So I try to eat as well as I can, but I also always have a cheat day.”