One more thing that this wise fella suggested was to do these 3 to 6 reps under control and to try and eliminate momentum. He recommended taking up to 6 sec for both the positive and the negative portions of the rep. I can see doing the postive in a controlled 6 second manner, but the question is, should the negative be so slow too? In my experience, if you take the negative so slowly, this actually allows you to "rest" a bit, since the muscles are much stronger negatively. Does it make sense?