Proceedings of the Royal Society B Biological Sciences· 2024
Sleep and subjective age: protect your sleep if you want to feel young
- 7citations
- 2024year
Short summary
Insufficient sleep and sleepiness significantly increase subjective age, with two nights of sleep restriction making people feel an average of 4.44 years older.
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Key points
- Each additional day of insufficient sleep in the last 30 days increased subjective age by 0.23 years (n=429).
- Two nights of sleep restriction (4h/night) made participants feel 4.44 years older compared to 9h/night (n=186).
- Increased sleepiness (KSS 1 to 9) was associated with feeling 10 years older in both studies.
- Subjective age is significantly influenced by sleep duration and sleepiness levels.
AI-generated from the title and abstract; the full text is not read.
Abstract
The current studies examined the impact of insufficient sleep and sleepiness on the subjective experience of age. Study 1, a cross-sectional study of 429 participants (282 females (66%), 144 males, 3 other gender; age range 18–70), showed that for each additional day of insufficient sleep in the last 30 days, subjective age increased by 0.23 years. Study 2, an experimental crossover sleep restriction study ( n = 186; 102 females (55%), 84 males; age range 18–46), showed that two nights of sleep restriction (4 h in bed per night) made people feel 4.44 years older compared to sleep saturation (9 h in bed per night). Additionally, moving from feeling extremely alert (Karolinska Sleepiness Scale (KSS) score of 1) to feeling extremely sleepy (KSS score of 9) was associated with feeling 10 years older in both studies. These findings provide compelling support for insufficient sleep and sleepiness to exert a substantial influence on how old we feel, and that safeguarding sleep is probably a key factor in feeling young.
The authors' abstract, as published at the source. Proceedings of the Royal Society B Biological Sciences, 2024 · DOI ↗
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Field: Experimental and Cognitive Psychology
Experimental and Cognitive PsychologyPsychology