BodyWatch

BECOME A DANCING MACHINE

Sienna Miller has been keeping her petite frame long and lean with regular high-energy dance workouts at Studio Soma in West Hollywood. "Sienna is taking Pilates and dance in preparation for an upcoming movie role," says her instructor, Thalia Thomas. The actress is a fan of the Cardio Boogie class, a workout designed for non-dancers that fuses everything from hip-hop and disco to Broadway musicals and belly dancing. Let dance be your muse and try Health.com's ballet-inspired leg workout! – Mary Margaret