I’ve been watching a lot of the Olympics swimming. I like swimming and there are a number of compelling stories in there, including Phelps but also just the fact that world records are being smashed by everyone.
(Incidentally, if you haven’t watch the whole men’s 4×100 video it’s much better than just the highlights.)
One would think that the most efficient stroke would be the most symmetric, but particularly in the short distance freestyle these people (who obviously know what they’re doing) have very asymmetric strokes. They are much slower on their breathing side. I find that interesting.