I have read in this forum that throughout any point in a repetition, the stress on the muscle is equal throughout. The muscle was described as being like a rubber band, with the tension equal in all parts. I think this puts away the myth that certain ranges target certain portions of the muscle; such as tagetting inner pecs rather than outter pecs. With this in mind, why should I train the full ROM instead of just the range which yields the post power. It seems that if I can lift twice as much in a partial repetition, and the stress across the muscle is equal, then I'm not missing out - only gaining. Is it because the distance traveled is greater, increasing the force that is required to move the weight? Any input would be greatly appreciated.