eli5: Why sleeping late and waking up late is worse than sleeping early and wake up early

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Lets say I sleep at 1am and wake up at 9am, why my body reacts negatively compared to sleep at 9 pm and wake up at 4 am. Both are 8 hours of sleeping time. How can my body knows it is past 12pm and decides to give me a bad day because of it.

In: Biology

11 Answers

Anonymous 0 Comments

It’s more the consistency that matters rather than the actual hours. 

Bodies like routine, and take some time to adapt. Most people would have difficulty waking up at 4am but would get used to it eventually. 

Additionally it really depends on the quality of the sleep and how you go to bed. Are you going to bed at 1am wired from gaming or something else, or have you chilled out for an hour beforehand? 

A huge amount of stuff from your diet and habits and noise affects your sleep. It’s not as simple as just x time sleep, y time wake up. 

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