Sleep-Wake and Hunger-Satiety Rhythms

Overweight and obese people sleep less than normal weight people do.²⁸⁸ On average, people who sleep 8 hours weigh the least, and for every hour less than 8 a person sleeps, her weight increases proportionately.²⁸⁹ Why is this?
There are several theories.
Experiments suggest that the sleep–wake cycle and the hunger–satiety cycle are intricately linked.
How does the body control hunger?