+ wishlist Mind Gym: An Athlete's Guide to Inner Excellence for Outer Performance [Paperback] Add to Cart The item has been added Author: Gary Mack Mind Gym: An Athlete's Guide to Inner Excellence for Outer Performance [Paperback] Buy More - Save More. Below are the available bulk discount rates for each individual item when you purchase a certain amount Quantity Price Savings 25 - 99 36% 100 - 249 39% 250 - 499 43% 500 - 999 47% 1000+ 50% List Price As Low as $20.00 Format: Paperback