People who make fun of illnesses/maladies that kill? Stay classy. Many people that have sleeping disorders are overweight. Braddock's is related to his anxiety disorder, probably just a "racing mind" type of thing. As stated, a body needs sleep, here are far more car accidents the day the clocks are turned ahead than normal. I worked 80 hours a week for a couple years, and your body does adjust, but you're still drowsy, find it harder to concentrate, and the like. Tough to be a world class athlete in that state, to say the least. They have special forces do varieties of puzzles and the like after being up for 36+ hours, they learn how to "fight through fatigue," as you can't wait to shoot OBL because you are tired. However, for most folks, it's easier just to get enough sleep.