Im not about to say weights are worthless, because we all know that would just be wrong. But I was reading a fitness book by some karate master yesterday, oriental guy, and it was all about increasing strength. Quite a few of the exercises invloved this: moving really slow, and straining. For example- pretending there is a giant rock in front of you, and straining and pushing it away from you, slowly. Well, I went home and tried some of them, and I'll tell you, 10 minutes into it, I was dripping wet, and it was working! Has/does anyone else ever do these kinds of exercises?