The easiest way to explain lack of sleep that I have found is that usually it is my brain in overdrive thinking about something that is stressing me. Whether that be work, my future, or other topics, if something is stressing me out, I sometimes can not fall asleep. Even in the waking hours, stress can only be harmful to your health, and especially so when you are trying to sleep. Sleep is a necessary body system that allows your body to repair itself, both physically and mentally. There are several sleep cycles. During three of them, your body is being repaired and during the fourth, or REM sleep, your brain is repairing itself. It is still in use, but it is on "sleep" mode, if you will. You can literally force yourself to sleep if you stay awake long enough straight through because at some point, your body reaches its physical limit and the brain MUST shut down to repair. This is the case with every human. I suggest you Sleep cycle alarm clock through this you get more results about Sleep Cycle .
