Arthur's Chains
One of the most effective training ideas, and one I dearly wish I would have thought of first, was revealed to the world by Arthur Jones in 1970. No, I’m not referring to the first Nautilus Pullover machine, although that too was a step into another dimension. It was the use of heavy gauge chain to provide variable resistance while using a barbell.
Arthur advised the trainee to attach this heavy duty chain to each end of the barbell or pulley, so that additional links of chain were lifted off the floor as the exercise was taken closer and closer to the point of full contraction. As a muscle’s ability to contract strongly increased, or leverage factors improved, more weight could be used. With the addition of the chains, one was lifting more weight as the barbell was moved further. Not perfect, and certainly more effective in some movements than others, but a tremendous improvement in the effectiveness of most conventional exercises.
I recommend the heaviest chain one can find. Nautical stock makes for a far more difficult, yet productive workout than the usual hardware store or Sears fare, so take the time to look around. Depending upon the type of bar being used, the chains can be attached by a variety of simple and efficient methods. This small alteration in technique can increase exercise productivity more than you can imagine.