I was tired because I had a long day at school with exercises to still to do. I spent 4 hours in Tae Kwon do. First I helped out in class, then I had a mentor meeting, then I helped out in another class, and after that I did a black belt class. When I got home I laid in bed until I realized I still had 50 push ups and 50 sit ups still to do. So basically it was a tiring day.