The big pitfall of being denied quality sleep is being tired most of the time. All of the time.
And I tend to yawn all the time too, which I think can appear to be rude at times- not to mention the whole contagious yawn thing.
I seriously yawn on the elliptical machine at the gym. That is just silly.
I mean, look at this thing, my instinct is to run away screaming, exert sleepiness.
My first sleep doctor told me I should exercise more to help my sleep. Good advice I suppose, but I do not think he meant to sleep at the gym.