By Kim Peiffer
Nov 13, 2015 @ 8:30 am

Baby bump or not, Chrissy Teigen is one hot mamma. And despite the fact that the newly expecting star loves to indulge in food, she balances it with regular workouts at calorie-torching barre class Physique 57.

Eager to learn how to get the stars super-toned gams, I went straight to Physique 57 co-founder Tanya Becker, who taught me the exact leg move—ahem, a four-part courtesy lunge, mind you—that she does on Teigen.

Check out the video above to learn Teigen’s leg move. Warning; it’ll burn, baby, burn.