Stay Hydrated when Swimming, Swim More
It makes sense, but was non-obvious to me (maybe to you, too) that you should drink water when you swim. I just swam 2.5X my usual, was more comfortable while doing it, and felt better at the end by stopping a few times to drink from a fountain.
Try it next time you’re at the pool—you might see that when you thought you were tired, you were really dehydrated. Actually, if you think about all those people sweating away their bodies’ water, maybe you won’t want to go swimming.