RE: swimming & wieghts
I used to be a keen swimmer, i could go for hours, then i took up lifting and i literally cannot go one length without being completely shattered. Its not because im unift, i still run a lot, my muscles just cant take what i suppose you could call "ultra high reps" in water. Also i dont float anymore which sucks. I wish that when i started lifting i combined it with my swimming so yes, id say its a very good idea to do both, watch out for overtraining though.