Are You an Early Bird or a Night Owl?

Does the early bird always get the worm? Are there real biological differences between early risers and night owls? Everyday Einstein explains

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Scientific American Quick & Dirty Tips Scientific American

Hi I’m Dr. Sabrina Stierwalt, the , bringing you Quick and Dirty Tips to help you make sense of science.

As an astrophysicist, I am happiest when I am at a telescope observing distant galaxies. My happiness is not just because I’m gathering data to further my research, but also because my body and mind feel their best at night. But that's not the case for everyone. I know plenty of folks who functon best in the early morning.

Do we learn our sleep patterns or are they hard-wired in us from the start? Are there real biological differences between early risers and night owls? Let's find out.

Are Night Owls Born or Raised?

I can also tell you from firsthand night owl experience that living with an early riser has made caring for our infant much easier. There is never a question of who should get up with her in the middle of the night versus the early morning. (Dibs on the night!)

Our preferences for early riser versus night owl behavior are encoded in genes called “clock” or “period” genes that regulate our  and are thus linked to our , metabolism, body temperature, and hormone levels. Studies have shown links between the length of  and people’s chronotypes, as well as the amount of sleep they need per night.

Environmental cues like light and diet (called “zeitgebers”) can work to alter our body’s sleep clock. Anyone who has taken an overnight flight knows the upon landing. Your body feels like it's 3am while the sunrise outside tells your brain something different. The , smartphones, and televisions is enough to delay the body’s nightly , the brain’s message that it is time for sleep.  

 

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