When it comes to turning back the clocks on our devices, technology has us covered. Our smartphones automatically adjust.
But our internal clocks aren’t as easy to re-program. And this means that the time shift in the fall and again in the spring can influence our health in unexpected ways.
“You might not think that a one hour change is a lot,” says Fred Turek, who directs the Center for Sleep & Circadian Biology at Northwestern University. “But it turns out that the master clock in our brain is pretty hard-wired, ” Turek explains. It’s synchronized to the 24 hour light/dark cycle.
Daylight is a primary cue to reset the body’s clock each day. So, if daylight comes an hour earlier — as it will for many of us this weekend — it throws us off.
“The internal clock has to catch up, and it takes a day or two to adjust to the new time,” Turek says.
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