Should Have Taken a Rest Day

I forgot that there was no school today. When I got the the Aquatic Center, the swim team was practicing, plus there were a number of kids and parents playing in the open lanes. I did a warm-up pair of laps, then started what I had hoped would be six but when I was into my second lap I became extremely tired. I should have thought about yesterday and taken a rest day. I got out of the pool and headed home. Even though I was tired, I still wanted to log some exercise so I took a leisurely 30 minute walk.