There are a few things that impact that including reduced number of daylight hours and the temperature. Our body has a built-in circadian clock, Walker explained. It regulates a lot of things, but one of the main things is our sleep schedule. That clock is strongly influenced by some external factors, the strongest being light. In the winter, when it gets dark earlier, that’s the signal for our brain to start to release a little bit of melatonin for us to start to wind down to go to sleep Our internal body temperature decreases at night when we’re sleeping and hits its lowest point a couple of hours before we wake up Individuals can have different responses to circadian cues like light, temperature and social activities, Walker said. In general, we all have a similar response, but there is individual variation If you feel frequently tired, always needing more sleep, that is quite common in our society. Walker says most people don’t sleep enough.
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Wednesday, October 1, 2025