I have a personal philosophy about bodybuilding that I have followed since I read this book while in the Marines, shortly after my combat deployment. It revolves around the the principles of Intensity, Recovery, and Consistency. I was subconsciously following that mantra while in Iraq when I lifted weights in my spare time, and slept like a baby afterward, pounding high protein, high calorie, high vitamin MRE rations in between and drinking an oil barrel worth of water a month in the scorching, unforgiving, inhospitable desert sun.
While that experience transformed my body from 155 lbs. of wiry calisthenics strength to 180 lbs. of lean muscle in only five months, I still hadn’t mentally internalized the theory of bodybuilding. Which, at this point is proven science: Building muscle through weightlifting and bodybuilding exercises requires three non-negotiable actions by the athlete. The factors can be named, simply speaking:
1) Intensity. This is how hard you lift and for how long - how much weight, how many repetitions, how many sets you have in a workout and how close you are to achieving total muscular failure. Exercise selection is a variable, as in what routine you follow, but effort is the prime factor of training Intensity. Muscles must be worked hard enough to cause damage to the individual fibers. The book teaches a philosophy that it is better to add weight very gradually over time (even with tiny 1 lb. increments per workout) than to max out each session, which is how many people burn out and abandon lifting altogether. “No pain, no gain” is true to an extent, but “all pain, all the time” is a recipe for injury and disaster. If you’re on steroids AND are genetically blessed, this can be mitigated to an extent, but this book is written for the genetically typical, not the guy who can deadlift a Volkswagen at age fifteen.
2) Recovery. This is how well one recovers from the intense workouts. Above all this means quality of nutrition and sleep, while having a lifestyle that is conducive to thieve periods of muscle building. Muscle grows while the body is at rest, after it is damaged by the intensity of applied efforts. So if you have a 12 hour a day job, or are a single parent of small children, have a stressful lifestyle, etc., give even more time and attention to your sleep and nutrition than typical before training again. This is even more important if you are not genetically blessed with mesomorphic qualities.
3) Consistency. This means repeating #1 and #2 not just for a month to “look good for the beach” or “fit in my wedding dress” but training Intense and allowing for Recovery over, and over, and OVER again for weeks, to months, seasons, years, decades, and your whole lifetime. Rome and Greece wasn’t built in a day and neither were her statues of the Gods, which you’re only going to look like when you are old if you keep this up consistently as a lifestyle, not a trend.
I hope this helps understand, broadly speaking, the key principles of this classic book. It certainly changed my life and I hope it will for you, too.