Joey Diovisalvi is the head strength, conditioning, and biomechanics coach at the PGA Tour Academy at TPC Sawgrass. He has been on the PGA Tour for over ten years and has worked with dozens of pro players, including Vijay Singh, Ryuji Imada, Pat Perez, and Chris DiMarco. He worked with Vijay Singh for seven years, helping him to become the number one golfer in the world. He lives in Jupiter, Florida.
Steve Steinberg is a fitness writer and a contributing editor at Men's Journal magazine. His work has appeared in GQ, Best Life, and Smart Business magazines. He's also a certified personal trainer and the owner of Black Belt Fitness Personal Training in Waltham, Massachusetts. Fix Your Body, Fix Your Swing is his second book.