I observe many people at the gym doing one arm exercises, one leg exercises, and one back exercises where they just work one side of the body or the other.
These are not bad exercises but, simply doing one arm or one leg or one side of the chest or one side of the body doesn’t implement nerve force.
And of course, this is why Vince was so far ahead of everyone else, he knew that in order to activate nerve force, both sides of the body must be worked simultaneously.
One arm exercises or one calf exercises or one shoulder exercises are just shaping movements to shape the muscle. They don’t invoke nerve force and when you don’t invoke nerve force then you can’t have growth.
Keep that in mind because I see a lot of people doing that and it is very difficult to tell them the exercises they are performing are erroneous and they’re not going to produce any growth, just shape.