I used to lift a lot. Not competitively, but I lifted pretty heavy. My problem was, that my body type bulks up too much. Add to that, my natural obsessive pesonality, and I would do things like deliberatly gain fat-weight to push me onto the next goal. For me, it was almost impossible to bench-presss, dead-lift, or squat heavier weights when I weighed under...300 lbs or so. And I was not very mobile at that size at all. I was only good for lifting heavy weights at the gym, or helping people move furniture, etc.
I have more slow-twitch than fast-twich muscle, compared to most power lifters, though. I had to build up lots of slower-speed muscle strength to lift "heavy".
I also used to swim a lot, but it is has been a while. I miss it.