Peggy Wachterhauser Brill, P.T,. is a board-certified clinical specialist in orthopedic physical therapy. Her private practice, Brill Physical Therapy, is in midtown Manhattan, and she also maintains offices in the corporate headquarters of Morgan Stanley and Credit Suisse First Boston. Her expertise is sought after by the Duke University men’s basketball team, top executives all over the world, and leading physicians at the Hospital for Special Surgery and several other major medical centers. The author of The Core Program: 15 Minutes a Day That Can Change Your Life, Peggy lives in New York City with her husband and two daughters.

Susan Suffes is a writer and editor who lives in New York City.