Week 735 or Something

So I've decided that I'm going to try to work up to swimming a mile (32 laps in a 25 meter pool - one lap is down and back, so 50 meters). Last week I was able to do 16 laps (half a mile), and yesterday I did 24 laps (3/4 of a mile). I'm having trouble remembering that swimming a mile is a lot more work than running a mile... That's the problem with being a runner rather than a swimmer I suppose.