We all know we need enough sleep for energy, health, and productivity. But life often gets in the way. When you miss sleep, you build up sleep debt. Sleep debt is the amount of sleep you need to catch up on. It is measured against your personal sleep need. For example, if you need seven hours but only get six, you’ll wake up with sleep debt. If you keep missing sleep, the debt grows.
There are two types: short-term and long-term sleep debt. Short-term debt, built up over days, can cause daytime sleepiness, trouble thinking clearly, getting annoyed easily, poor focus, and getting sick more easily. Long-term debt, built up over months and years, raises the risk of weight gain, heart disease, high blood pressure, anxiety, and depression.
The good news is research suggests you can catch up on sleep and make up for some of the damage. Sleep debt is real, but catch-up sleep isn’t a myth. In one study, participants sleeping five hours a night for a week had worse mood and performance, but these bounced back after two recovery nights. Catching up on weekends may lower health risks, and some studies suggest that weekend catch-up sleep can make the death rate similar to that of consistent sleepers. However, recovery sleep may not prevent all harm, such as weight gain.
Catching up takes time. The more sleep debt you have, the longer it takes. For example, one hour of lost sleep may take four days to recover from. To catch up, take short naps (under 90 minutes, before evening), go to bed earlier, or sleep in a little later (within one to two hours). It also helps to improve your sleep habits: keep a regular sleep schedule, get morning light, avoid caffeine and bright lights before bed, exercise regularly, and keep your bedroom dark, cool, and quiet. Try to get enough sleep each night, but if you miss it, catch up when you can. Your body and brain will thank you for it.
微信用户 May 19, 2026 12:55:26 AM
The lazy afternoon sunshine is perfect for reading a half-book
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微信用户 May 19, 2026 12:55:36 AM
"Don't be like this."
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微信用户 May 19, 2026 12:55:50 AM
Early bird
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微信用户 May 19, 2026 2:48:48 PM
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微信用户 May 19, 2026 2:49:00 PM
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微信用户 May 19, 2026 5:20:08 PM
The world is so big, I want to go out and show it to people more often.
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微信用户 May 19, 2026 5:20:16 PM
How can there be such a lovely person in the world?
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微信用户 May 19, 2026 5:20:25 PM
Pursuing dreams is a down-to-earth process.
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肖贝贝 May 19, 2026 5:58:55 PM
Lazy afternoon sun is good for half a book.
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肖贝贝 May 19, 2026 5:59:55 PM
The lazy afternoon sun is good for reading half of a book.
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肖贝贝 May 19, 2026 6:01:08 PM
The clock is ringing, get up!
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小叶子萱 May 19, 2026 7:18:13 PM
The afternoon sun is lazy, perfect for reading half a book.
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小叶子萱 May 19, 2026 7:18:32 PM
The afternoon sun is good for half a book.
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小叶子萱 May 19, 2026 7:18:51 PM
Tomorrow, I will have to wear beautiful dresses, I am so happy
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oUm2H1ddtsBTHnE6mSBxSzz-qAKQ May 19, 2026 7:24:03 PM
the same thing happened
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oUm2H1ddtsBTHnE6mSBxSzz-qAKQ May 19, 2026 7:24:13 PM
Please let me know if you have any questions
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oUm2H1ddtsBTHnE6mSBxSzz-qAKQ May 19, 2026 7:24:19 PM
I’m not sure
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微信用户 May 19, 2026 8:32:10 PM
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微信用户 May 19, 2026 8:38:12 PM
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*ﾟ▽ﾟ*pets May 19, 2026 7:11:29 AM
The lazy afternoon sun feels perfect for reading half a book.
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梦琪 May 19, 2026 1:35:02 PM
Lazy afternoon sun is good for half a book.
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perfect May 19, 2026 7:21:23 PM
Snow makes the world quiet and new
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perfect May 19, 2026 7:21:32 PM
Snow makes the world quiet and new
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perfect May 19, 2026 7:21:43 PM
Snow makes the world quiet and new
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冷静意志重围逆境突围沉着打压低调手法逆转残局极限突破自我压制终将问鼎证明巅峰冷静意志重围逆境突围沉着打压低调手法逆转残局极限突破自我压制终将问鼎证明巅峰冷静意志重围逆境突围沉着打压低调手法逆转残局极限突破自我压制终将问鼎证明巅峰冷静意志重围逆境突围沉着打压低调手法逆转残局极限突破 May 19, 2026 8:49:19 PM
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冷静意志重围逆境突围沉着打压低调手法逆转残局极限突破自我压制终将问鼎证明巅峰冷静意志重围逆境突围沉着打压低调手法逆转残局极限突破自我压制终将问鼎证明巅峰冷静意志重围逆境突围沉着打压低调手法逆转残局极限突破自我压制终将问鼎证明巅峰冷静意志重围逆境突围沉着打压低调手法逆转残局极限突破 May 19, 2026 8:49:30 PM
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