Light exposure behaviors predict mood, memory and sleep quality
Abstract Ample research has shown that light influences our emotions, cognition, and sleep quality. However, little work has examined whether different light exposure-related behaviors, such as daytime exposure to electric light and nighttime usage of gadgets, especially before sleep, influence slee...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-08-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-39636-y |
| _version_ | 1797752775315030016 |
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| author | Mushfiqul Anwar Siraji Manuel Spitschan Vineetha Kalavally Shamsul Haque |
| author_facet | Mushfiqul Anwar Siraji Manuel Spitschan Vineetha Kalavally Shamsul Haque |
| author_sort | Mushfiqul Anwar Siraji |
| collection | DOAJ |
| description | Abstract Ample research has shown that light influences our emotions, cognition, and sleep quality. However, little work has examined whether different light exposure-related behaviors, such as daytime exposure to electric light and nighttime usage of gadgets, especially before sleep, influence sleep quality and cognition. Three-hundred-and-one Malaysian adults (MeanAge±SD = 28 ± 9) completed the Light Exposure Behavior Assessment tool that measured five light exposure behaviors. They also completed the Morningness-Eveningness Questionnaire, Positive and Negative Affect Schedule, Pittsburgh Sleep Quality Index, and single items assessing trouble in memory and concentration. A partial least square structural equation model, showing 72.72% predictive power, revealed that less use of wearable blue filters outdoors during the day and more within one hour before sleep predicted early peak time (direct effect = −0.25). Increased time spent outdoors predicted a positive affect (direct effect = 0.33) and a circadian phase advancement (direct effect: rising time = 0.14, peak time = 0.20, retiring time = 0.17). Increased use of mobile phone before sleep predicted a circadian phase delay (direct effect: retiring time = −0.25; rising time = −0.23; peak time = −0.22; morning affect = −0.12), reduced sleep quality (direct effect = 0.13), and increased trouble in memory and concentration (total effect = 0.20 and 0.23, respectively). Increased use of tunable, LED, or dawn-simulating electric light in the morning and daytime predicted a circadian phase advancement (direct effect: peak time = 0.15, morning affect = 0.14, retiring time = 0.15) and good sleep quality (direct effect = −0.16). The results provide valuable insights into developing a healthy light diet to promote health and wellness. |
| first_indexed | 2024-03-12T17:08:24Z |
| format | Article |
| id | doaj.art-96c453e03b5a46d08f93ea9131074f7b |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-12T17:08:24Z |
| publishDate | 2023-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-96c453e03b5a46d08f93ea9131074f7b2023-08-06T11:13:10ZengNature PortfolioScientific Reports2045-23222023-08-0113111410.1038/s41598-023-39636-yLight exposure behaviors predict mood, memory and sleep qualityMushfiqul Anwar Siraji0Manuel Spitschan1Vineetha Kalavally2Shamsul Haque3Department of Psychology, Jeffrey Cheah School of Medicine and Health Sciences and Intelligent Lighting Laboratory, Monash University MalaysiaMax Planck Institute for Biological Cybernetics, Translational Sensory & Circadian NeuroscienceDepartment of Electrical and Computer Systems Engineering and Intelligent Lighting Laboratory, Monash University MalaysiaDepartment of Psychology, Jeffrey Cheah School of Medicine and Health Sciences and Intelligent Lighting Laboratory, Monash University MalaysiaAbstract Ample research has shown that light influences our emotions, cognition, and sleep quality. However, little work has examined whether different light exposure-related behaviors, such as daytime exposure to electric light and nighttime usage of gadgets, especially before sleep, influence sleep quality and cognition. Three-hundred-and-one Malaysian adults (MeanAge±SD = 28 ± 9) completed the Light Exposure Behavior Assessment tool that measured five light exposure behaviors. They also completed the Morningness-Eveningness Questionnaire, Positive and Negative Affect Schedule, Pittsburgh Sleep Quality Index, and single items assessing trouble in memory and concentration. A partial least square structural equation model, showing 72.72% predictive power, revealed that less use of wearable blue filters outdoors during the day and more within one hour before sleep predicted early peak time (direct effect = −0.25). Increased time spent outdoors predicted a positive affect (direct effect = 0.33) and a circadian phase advancement (direct effect: rising time = 0.14, peak time = 0.20, retiring time = 0.17). Increased use of mobile phone before sleep predicted a circadian phase delay (direct effect: retiring time = −0.25; rising time = −0.23; peak time = −0.22; morning affect = −0.12), reduced sleep quality (direct effect = 0.13), and increased trouble in memory and concentration (total effect = 0.20 and 0.23, respectively). Increased use of tunable, LED, or dawn-simulating electric light in the morning and daytime predicted a circadian phase advancement (direct effect: peak time = 0.15, morning affect = 0.14, retiring time = 0.15) and good sleep quality (direct effect = −0.16). The results provide valuable insights into developing a healthy light diet to promote health and wellness.https://doi.org/10.1038/s41598-023-39636-y |
| spellingShingle | Mushfiqul Anwar Siraji Manuel Spitschan Vineetha Kalavally Shamsul Haque Light exposure behaviors predict mood, memory and sleep quality Scientific Reports |
| title | Light exposure behaviors predict mood, memory and sleep quality |
| title_full | Light exposure behaviors predict mood, memory and sleep quality |
| title_fullStr | Light exposure behaviors predict mood, memory and sleep quality |
| title_full_unstemmed | Light exposure behaviors predict mood, memory and sleep quality |
| title_short | Light exposure behaviors predict mood, memory and sleep quality |
| title_sort | light exposure behaviors predict mood memory and sleep quality |
| url | https://doi.org/10.1038/s41598-023-39636-y |
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