What does sleep have to do with obesity? A lot, as it turns out.
According to an article in Quartz, “circadian coordination allows female pituitaries and ovaries to match up when triggering ovulation; our pancreas, gut, and hypothalamus to link up to make us both hungry and ready to digest; and sleep to be timed to when our muscles are ready to cool down and enable healing, as well as when our brains are most free for maintenance and memory formation.”
Everything from artificial light, shift work, and that 2am post-party hamburger and fries affect that rhythm. That means obesity, cancer, and even Alzheimers all relate to circadian rhythms. “Because every part of our body has been imbued with an innate circadian rhythm to keep all the clocks ticking in sync, every piece of us is susceptible to circadian disruption,” Quartz pointed out.
If you find yourself working better at a certain time of day, that has its basis in this same biology.