I just thought of it while I was trying to sleep and I just had to share it.
Fat kids don't run in PE class, not because it is too hard(though that could be true also) or because they are lazy, but because they don't want to be made fun of for how they look when they run.
Thinking back to elementary, middle and high school. I ran around a lot in elementary, I was a super active kid(Grew up to be a fairly active adult). But I remember being made fun of and called butter ball. Being told you looked gross when you moved, makes you want to do as little of it as possible in front of others. So near the end of elementary and for the rest of my school career I walked everything. I wasn't about to run and gross other people out.
I know that sounds horrible and I shouldn't of cared, blah blah blah. But I did then. At the end of high school I started to stop caring so much. But I still remember feeling like everyone is watching me and making fun of me. I actually failed PE in high school because I never ran anything. Apparently they can fail you if you don't beat a certain time *shrug*.
Either way just a random thought to get out there, now off to bed!