Why do you need to sleep?

Because you need Leptin -- a hormone that controls your appetite.

So, get less sleep, feel more hungry! Which means over-eating, which means FAT.

How much sleep do you need to stay healthy? 7-8 hours.

There's really no shortcut -- 7-8 hours of sleep at night helps release the chemicals your body needs to work just right. Including releasing the hormone leptin that helps control appetite. Start sleeping less and your body will start feeling out of whack... and not just tired.