A Regular Bedtime is Key…
Sure, going to bed on time is important—you’re more likely to log enough sleep when you stick to a nightly schedule. But it turns out the time you rise in the morning might have even more impact. “Aiming to go to sleep on time is smart—the body loves regularity,” says Fitbit sleep advisor Michael Grandner, PhD, MTR, director of the Sleep and Health Research Program at the University of Arizona College of Medicine. “But it’s a consistent wake-up time that sets your circadian rhythm, which regulates your sleep cycles and ensures you hit all the sleep stages your body needs,” explains Grandner.
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…But a Regular Wake Up Time is Even More Important
Switching up your wake up time—say, by sleeping a couple hours later on a Saturday morning—has the same effect on your body as flying across the country and changing time zones. Which explains why weekend sleep-ins don’t always leave you feeling refreshed. “Jet lag throws off your circadian rhythm,” says Grandner, “and it can take your body awhile to get back in sync.”




