"When you are finished changing, you're finished"----Benjamin Franklin
Sleep is extremely important. Recent research is indicating that poor sleep makes it difficult to get your body to it’s optimal weight among other maladies.
It all has to do with circadian rhythms.
Circadian rhythms are physical, mental and behavioral changes that follow a roughly 24-hour cycle, responding primarily to light and darkness in an organism's environment. They are found in most living things, including animals, plants and many tiny microbes.(from Google Chrome definition search)
To go really in-depth with plenty of scientific jargon, go visit Dr....