do u lock out at the top of any movement or not? as far as intenisty goes, that is. after recently watching pumping iron i realized they dont lock out at the top of there movements,...for instance when ferigno is benching and overhead pressing. it seems it would be more intense that way seing as the target muscle remains under pressure the whole time but then again tho locking at the top gives u the oppurtunity to "squeeze" the target muscle. so what is better / more intense locking out or just pumping em out with no lock?