Swimming is Exhausting

Mom and dad had a swim meet today, but I think I swam the most.  They would swim with me in between their events in the small pool.  There was no time to take a nap so i just got to swim all day.  We left the pool around 5pm and mommy seemed worried for some reason.  We stopped at McDonald's and by the time we parked with our food, I was ready to close my eyes.  Mom pleaded for me to wake up to eat...I took about 2 bites and told her i was too tired to eat.

I guess I fell asleep after that and she tucked me into my bed once we got home because she had to wake we up at 7am the next morning to get me up for school.  Did swimming really make me that tried?