Whether it be from staying up late to study for a test, putting long hours in at the office, or talking on the phone all night to a distant lover, sleep deprivation can take a toll on your body and mind. The brain has been shown to function at a slower rate when it has not been provided with adequate rest. At the same time, your muscles perform well below their potential, as they have not gotten the chance to repair themselves overnight. You might feel sore or just very heavy in any task you try to accomplish. Eventually though, you get the sleep you need when you have time to lay down and relax. I don't know of anyone who would want to try, but did you know that it is impossible to force yourself to stay awake forever? The body will take over when it has worked until it can work no more and needs time to rejuvenate itself. Read on further to learn about associated disorders and other effects sleep deprivation has on the body.