Harper, Pines said, regularly works with well-known actors preparing for new roles; musicians embarking on world tours and business executives desiring increased energy and strength. Harper created all of the personal workout chapters for the New York Times best-sellingYOU:books series and accompanying workout DVDs with Drs. Mehmet Oz and Michael Roizen. His most recent book,Mind Your Body, explores the connection between meals, moves, and mindset.