I'm sure most will simply ignore this post, but for those of you truly opened minded, you will thank me later.
So I was watching Mark Bell's Power Podcast and he had a guy named Doug Brignole on. He is been bodybuilding for 40+ years, was Mr. Universe and a few other things. Anyway, getting to the point, he basically proves with physics and math that many of the "must-do" mass builders, and several other popular movements are inefficient and simply not worth doing due to risk to and strain on joint; that the fitness industry is promoting myths and falsehoods due to keeping tradition and the mentality of "train hard or go home," "gotta hit the muscle from every angle" with a ton of redundant and ineffective exercises, when really, we can stimulate our muscles without destroying our bodies by avoiding exercises that "cost" a ton of energy to do, but don't even load the muscle we want that well.
To break it down, isolation movements are always superior for "mass building" than compound; it is a bold statement, but irrefutably true. I went on to watched a ton of his interviews, aside from the two posted below, then started applying the optimal physics to my workouts. There is no debate. I bought his book also so I could learn more, and now I'm an advocate lol.
The hardest part will be convincing all the people who have seen results with barbell movements like bench, squat, SLDL, barbell curls, skull crushes, deadlift etc., (we all have) to let go of these things for bodybuilding purposes. Now, no one is saying these things don't work at all, but they don't work as well. For example, you get 100% quad load from extensions, but only 30% from squats, so it makes no sense for us bodybuilding to use more energy than necessary to try and load the quad muscle with a less effective exercise, all while increasing the risk of injury, when we can just do the better one for more sets.
Now, how did Ronnie and others build huge legs with squads and for forth? Well if you add up all the sets and exercise they did, an exercise with the efficiency of 30% here, 40% there, 20% etc, you will get 100% stimulus, but they could have done all that without using least efficient movements. And look at Ronnie now? Many pros get injured doing things they don't need to be doing, but think they should be doing it because someone before them told them so. The only people who should doing compounds are those who are powerlifting or competing in strength, but for bodybuilding, there is literally no reason to do anything compound at all; the best movements are with dumbbells and cables, but not just any dumbbell or cable exercises, there are specific ones that load the muscle the best way possible because of their biomechanical profile.
Anyway, here's there two interviews. The first one got people triggered; the second one clarified it more. I've been in touch with Doug via DM on Instagram, and he is ahead of his time with this stuff. It is crazy once you see what he is saying, how we didn't conclude these things on our own.
https://www.youtube.com/watch?v=8VdX59JGEgQ&t=8319s
https://www.youtube.com/watch?v=qG8_if1Wz-0