Though Smart Barre's studio is outfitted with a traditional ballet barre, there's not a tutu in sight and no one is practicing their pirouettes. Instead, instructors lead students in a workout that combines principles used in yoga, Pilates, and, yes, ballet, to help them sculpt the long and lean physique of a dancer. The workout is based on a series of small, isometric movements and resistance drills designed to work the areas where women tend to struggle most: the arms, thighs, hips, and abs. They also emphasize stretching and building proper postural alignment throughout the total-body workout.