Brook Siler was hailed by "Vogue" as on of America's most sought after Pilates trainers. Author of the "New York Times" bestseller "The Pilates Body," she is owner of the acclaimed re: AB(R) studio in New York City, where her clients have included Madonna, Liv Tyler, Amber Valletta, and many others. She studies under the tutelage of Romana Kryzanowska, Joseph Pilates' protege for more than 30 years, and now sits on the board of the Pilates Guild(R)