Sleep In!

摘要

Are you socially jet-lagged? If you need an alarm clock to wake up, then you probably are. The term, coined by Till Roenneberg, a chronobiologist at Lud-wig-Maximilians University in Munich, refers to what happens when your internal body clock wants you to stay asleep but your external social clock wants you to wake up. By getting up with our alarms all week and sleeping late on the weekends, it's like sending our body clock to the West Coast and dragging it back East Monday morning.