Genetics or motivation?
I don't know about any one else, but I am A bit of both. I posted a thread on my pre training size and strength, (and you will definatley laugh at my first lifts), and while not the strongest man in the world, I can still move alot of iron after fifteen years.
But my overall strength was greater at 225 as a powerlifter (natural), than now as a bodybuilder ( juiced). All I can tell you was that the aproaches were different, in powerlifting you focused solely on the lift, and in bodybuilding you focus much more deeply on the muscles. In Powerlifting comp's I would just go animalistic for a lift as long as it was good, and didn't want to feel the muscles, just lift. But as soon as I switched to bodybuilding teqniques, I halfed my powerlifting weights and started getting bigger alot faster.
Maybe strength is all relative to intensity.
As long as I keep getting stronger in at least one bodypart at all times then at least I am making progress.
Katana