Book excerpt: Why are some octogenarians competitive athletes while others struggle to walk up the stairs? It isn't luck. It's orthopaedic science. If you're tired of doctors telling you that an injury will prevent you from playing the sports you enjoy, you'll love Dr. Kevin R. Stone's Play Forever. All great athletes get injured. Only the best of them use those injuries to come back to their sport better-fitter, faster, and stronger than before. Through Dr. Stone's revolutionary approach to sports medicine, you'll discover how injuries can lead to a lifetime of high-performance fitness and athleticism. Learn how the musculoskeletal system can be repaired through cutting-edge therapies, then honed and strengthened through semiannual fitness tests, preseason education and training programs, and regular in-season tune-ups. Backed by scientific outcome studies on orthopaedic treatments and implants, Play Forever will become your go-to health and fitness source, helping you play the sport you love to age 100 and beyond.