David Epsteinhas a master s degree in environmental science and is an award-winning senior writer for"Sports Illustrated, "where he covers sports science, medicine, and Olympic sports. His investigative pieces are among"Sports Illustrated's"most high-profile stories. An avid runner himself, he earned All-East honors on Columbia University's varsity track squad. This is his first book. He lives in Brooklyn. For more information visit http: //thesportsgene.com.