Your circadian rhythm is controlled by the release of substances like the hormone melatonin, which can make you feel sleepy, says functional medicine doctor Heather Moday, M.D.

There's a whole cascade that happens when you get out of your normal circadian rhythm. It affects your light/dark schedule, which can put your mealtime and exercise routine out of sync, too, says Winter. Basically, something as seemingly minor as going to bed whenever you feel like it can throw a lot of things in your life out of whack.

Changing up your bedtime can also make you feel more tired, even if you're sleeping in the next day. "When you alter a sleep schedule more than an hour difference, your body feels tired because your circadian rhythm has not been synced," says double-board-certified integrative medicine doctor Amy Shah, M.D.

But fatigue is only one thing you might deal with if your bedtime is all over the place. "Everything from our digestion, immune system activity, and hormones are regulated by our sleep-wake cycles," Moday says. Getting out of a good sleep rhythm when you're also stressed out (like most of the world is at this moment) can even increase your risk of getting sick, Moday points out. And that's really not something you want to mess with right now.

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The 2 Alarms You Should Be Setting Every Day During Quarantine - mindbodygreen.com