# Is this "sleep debt?"

**URL:** https://boards.straightdope.com/t/is-this-sleep-debt/388127
**Category:** Factual Questions
**Created:** [January 15, 2007, 10:48pm UTC](https://boards.straightdope.com/t/is-this-sleep-debt/388127 "2007-01-15T22:48:09Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![TLDRIDKJKLOLFTW](https://avatars.discourse-cdn.com/v4/letter/t/51bf81/32.png) [@TLDRIDKJKLOLFTW](https://boards.straightdope.com/u/TLDRIDKJKLOLFTW)
#### Post date: [January 15, 2007, 10:48pm UTC](https://boards.straightdope.com/t/is-this-sleep-debt/388127/1 "2007-01-15T22:48:09Z")

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Whenever I go an entire day on very little sleep, without napping, I’m completely wiped out the next day even after getting a full night’s sleep.

For example, yesterday I got about 4 hours of sleep at night (whereas I usually get 8 or 9), then worked an entire 9-hour shift at a coffee shop before going out with my friends afterward. I didn’t get to sleep until 2 am, but then I slept a good 9 hours before waking up today. But today I’m really groggy and have already napped twice, and I generally feel wiped out.

Is that “sleep debt?”