In the Victorian era, people made their cores look tight by wearing corsets, which doubled as bulletproof vests during pistol duels. Strengthen your core and extremities until they are naturally impervious to bullets instead with today's Groupon: for $15, you get three Nia classes at The Pilates Principle in Latham (a $30 value). This Groupon expires on Sunday, May 29. Nia classes are held on Sundays at 9 a.m, beginning May 1.

Nia students turn, step, and kick in barefooted unison to rhythmic music from more than 45 countries during a unique cardio routine that combines dance and martial arts. The unique combination of 52 movements increases cardiovascular strength while targeting the lower body, the upper body, and the nougaty core. The staff at The Pilates Principle, led by physical therapist Nuhar Jaleel, teaches in an opulent venue full of warm colors and Moorish touches, such as arched doorways, metal-and-glass lanterns, and a petting zoo for flying carpets. The eco-friendly studio is built with bamboo floors, recycled carpeting, and energy-efficient lights that conform to the New York State Energy and Research Development Authority's Small Commercial Lighting Program.