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Prior to leading a noon-time Iyengar yoga class, 73-year-old yoga instructor Nicole "Nicky" Plaut warms up with an inverted pose in a yoga sling at the Mound Street Yoga Center in Madison, Wis., on May 15, 2003.  Plaut, a native of Belgium, has been practicing yoga for more than 50 years and teaches 14 inspired but humbling, yoga classes per week at several Madison-area locations.