About the Author
Mark Verstegen, founder and president of Athletes' Performance, has worked with some of golf's biggest names, including David Leadbetter and his world-famous golf academies, Phil Mickelson, Billy Mayfair, and Candie Kung. A world-renowned performance coach, consultant, and motivational speaker, he lives in Scottsdale, Arizona. Pete Williams is the author or coauthor of numerous books, including "Core Performance Women" and the Rodale titles: "Core Performance," "Core Performance Essentials," "Core Performance Endurance," and "Fun Is Good." He lives in Safety Harbor, Florida.