How OFTEN do you SWITCH EXERCISES?

[emptywallet]

That ain't it.

The reason you're weaker is the reason it's effective.

When you stick with one exercise, the body adapts and becomes more efficient at performing it. That's why if you want to bench more weight, you practice benching, not developing the pecs. In order for a muscle to grow it must work harder, not easier.

You need to choose whether you want to be strong or muscular. Sure, when you get muscular you get stronger and when you get stronger you get more muscular, but they're side effects of each other. It's possible to be good at one and not very good at the other.

The muscle doesn't care what the weight is. It only knows stress.

(BTW: Lot's of people will disagree with this, but they're wrong).

I kinda grasp on what your saying. Can you elaborate more? In any case, if this is what your opinion is, I'd like to see the kind of training you advocate.