Fellas, I'll level with you. I'm utterly Mentzerpilled. The first three quarters of this book is Mike Mentzer systematically deconstructing every broscience myth you learned from the kid who "taught you lifting" at the field house.
"1g/lb of body weight? That's arbitrary. Use reason. Use Objectivism. A muscle is 22% protein. Eat 22% protein, and 63% carbs, and 15% ice cream."
"Muscle confusion? A muscle does not have an identity. It cannot be confused. Ridiculous."
"The bodybuilding industry is full of hucksters who want to sell you fraudulent supplements. A logical bodybuilder will trust their higher reasoning and stick with staple and empirically tested supplements from the Golden Era of Bodybuilding, such as creatine, horse steroids, and good old fashioned methamphetamine."
He talks about how so much of bodybuilding training amounts to folklore, and how the idea "everyone responds to different training methods" doesn't make sense from a medical standpoint. He also took issue with people taking successful bodybuilders' words as gospel, but had the class not to point out that the primary authority on bodybuilding lore, Arnold Schwarzenegger, lied compulsively and for fun all the time.
Look at the evidence (as Mike would no doubt implore you). Pumping Iron is a video confessional of Arnold Schwarzenegger gaslighting his friends. Arnold excelled at bodybuilding, at acting, at governating, ESPECIALLY at PR, but his first and truest love was always recreational psyops.
Mentzer's empirical answer? Go balls-to-the-wall in the gym to the point of absolute muscular failure. If muscle increases size through repairing these microtears, make as many microtears as you can by pushing yourself to your physical limit. This is the premise of high-intensity training. Then, once you've done your whopping 25 minutes of 2 agonizing sets to failure per body part? Go home for a week. Don't come to the gym for 7 days. Read a book. A philosophy book. Start a salsa company. Hug your dog. Get a hobby that doesn't involve having the fellas oil you up. Cultivate your mind.
"7 days, Mike? Won't I lose my gains?"
Dom Mazetti is not an empiricist, or even a bodybuilder. He's technically not even real, and everything he says is satire. So you can't treat him as a source of lifting knowledge. Muscle and Fitness magazine is actually a worse source, because, like Mike Matthews said in Bigger, Leaner, Stronger, if they told you the truth you'd never have to buy more than one magazine.
Recent studies have vindicated Mike Mentzer, of course. A man who trains regularly can coast on three or more weeks of complete inactivity without any loss in muscle or strength.
By working yourself to absolute muscular exhaustion, doing the most damage you can to your tissues while staying out of the hospital, then taking 4-7 days off, you give yourself plenty of time to recover and avoid the risk of the dreaded (semimythical) CNS fatigue, which leads to overtraining, catabolism, bad dreams, income inequality, world hunger, climate change, whatever.
He also pushes negative reps and pre-exhaustion, which is real counterintuitive for me, but makes sense from a hypertrophy perspective. The numbers are irrelevant in mass-building. The damage you do to the muscles is what results in more mass, and eventually, greater strength. Knocking 20 lbs off your bench set because you pre-exhausted with flies is a devastating blow to the ego, but well worth the trade of greater muscular activation and, consequently, more growth.
The last 25% of the book he talks about being a bodybuilder, likening it to being a warrior, and an Olympian, and reading Nietzsche for five hours precontest to get himself pumped up.
Mike Mentzer was a huuuuuge dweeb. Like a jacked Ben Shapiro. Curlbros SMASHED with EMPIRICISM and LOGIC! But, he did the work, and he's coming from an era when dweebs used to be smart, instead of just really into collectibles and Disney IPs. Not to mention that perfect 100 in Mr. Universe. Really no arguing with that.
So he's a dork, but he's credentialed. Let's give it a try. I'll hop on High Intensity Training the Mike Mentzer way for a few months, and if I'm shredded to the bone and 5'8" by June, we'll know it worked.
And if my resounding success gets me suicided by Big Whey, know this: I'm really happy all the time and definitely wouldn't suicide. Also, my vitals are perfect, so don't buy the 'heart attack' line. Follow the money. Trust no one. The truth is out there.