Branko720 wrote: If the mechanics work in a drill, they should work from full approach and if it works from full approach it should work from a drill. Does that sound logical?
Take for instance shot put or high jump. They both plant their lead leg in order to prevent it from 'mushing' and to better transfer the energy from the glide (or approach in HJ). If you were to do a standing shot put throw and plant your leg properly, you actually will not throw it as far as if you were to bend the lead knee and and roll over to get the shot put moving better. So in this case, doing the drill differently than the technique you will use for a full throw, will make it go farther. In the case of the shot put, if you mush that lead leg on a full throw you will probably throw pretty flat and might fall out of the circle. The same goes with high jump. If you told someone to do one step and jump in the high jump, they would have to bend the take off leg in order to jump more. But in a real high jump the plant leg hits the ground out in front of the body and straight in order to transfer the energy from the approach run up. But because there is no approach run, someone taking just one step and jumping might mush a little more. This is why you can have a bad vertical, but still high jump pretty high.
One of the most effective things about a smooth long swing is that it can more efficiently transfer the energy of the run, through the swing, and off the top of the pole. During a 'zero drill' there is no run energy to be transferred, so to move up and off the pole, the athlete has to generate that same energy in a different way (pulling in your case).