Em and I have been swimming. We signed up for a "Tinman" triathalon--an Ironman Tiathalon that you have one month to complete. I'm amazed at how quickly we've gotten better at swimming--when we first started we did 12 laps and I thought I was going to die. Now we can go 20 without much problem. The weird thing, for me, is that I'm actually enjoying it.
I tend to zone out a bit more than when running or biking. I think that has something to do with how much I have to concentrate on what I'm doing, as opposed to just plodding along on the bike or treadmill. Time goes by pretty quickly.
This shot is of the lanes we try to swim in. This sight has gone from generating fear to excitement for me. It's a great experience.