"Product Details": This is "Triathlon Anatomy," a book specializing in the muscle anatomy of triathlons. It details the use of muscles and training methods required for each of the three disciplines: swimming, cycling, and running, from an anatomical perspective. It is currently out of print and a valuable, hard-to-find book. Highly recommended for triathletes, coaches, and physical trainers. "Features": ・Practical anatomy book specifically for triathlons ・Rare, out-of-print title ・Rich in photos and illustrations, deepening understanding of training "Condition": ・Overall in good condition. ・Slight yellowing on some pages, but ・No folds, writing, or tears; it has been carefully stored. "Notes": Due to being out of print, it is rare in the used market and a high-value item. Please refrain from purchasing if you are sensitive to used items. Returns are not accepted.