I cannot give this book anything other than 5 stars. Yes, it is hard to get through. And yes, some of it is dated. But man, this is the know-all-be-all bible of training studies. I learned about: the role of calcium, the determinants of VO2max (of which only one is aerobic) and why the musculature and metabolism is actually defining the VO2max and inherent talent, not the other way around. I learned about the greatest idols of the past (alternative training days of Zatopek or weeks of Ron Hill), the best known training philosophies of Jack Daniels, Lydiard, Sleemaker, Galloway, Pfitzinger, Costill, De Catellia, etc. and the all the numbers: percentage of added Oxygen Cost per incline gradient, headwind, an added 100gr on shoes, slipstream, etc. I walk away with more formulas to calculate training paces ans race predictions. He gave me definite answers on high carb diet, carb loading, glycogen depletion rate of the liver, advised fluid or supplemental intake. There we're graphs to show how different work-to-rest ratio's manipulate lactate levels and heart rate during different workouts, to guarantee the best training adapation without wasteful strain. The chapter on training the mind and advice for balance in life was really magnificent and worthy of 5 stars on its own. Enjoy the challenge, play as a child, smile, talk slowly, stretch. Learn from each race and have a hypothesis going into each training block. The battle for mature self-acceptance in the face of ego-satisfying activities: to commit but not fall into addiction. Even more so as a parent of coach, be egoless, control the emotions, don't turn it into a proving ground. His info on Running injuries is solid and, unfortunately, too recognisable. In the end, he emphasizes the limits of research and how your own feeling and bodily sensations are still the best test to judge pace and effort. What. A. Gem.