J Sleep Res April 2012 PMID 22074234

Associations between seasonal variations in day length (photoperiod), sleep timing, sleep quality and mood: a comparison between Ghana (5°) and Norway (69°).

Oddgeir Friborg, Bjørn Bjorvatn, Benjamin Amponsah, Ståle Pallesen

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Mentions

61
Peak: 3 in Jun 2023
across 4 sources since Jun 2023

Extended reach

36,910
potential audience

Total likes

33

Video views

797

Mentions per month

Jun 2023 – Oct 2025

Where it's discussed

  • News51 articles
  • Blogs5 articles
  • X / Twitter3 posts
  • YouTube2 videos

AI synopsis

What people are saying

Posts frequently reference how decreased daylight correlates with delayed sleep and increased fatigue, using words like 'related to' and 'increased problems,' which emphasize agreement and relevance. The tone is analytical and curious, with some commenting on implications for chronotype stability, showing high interest and engagement, while recognizing the study's potential impact on understanding sleep and mood disorders.

AgreementModerate agreement

Most discussions acknowledge the study’s findings that reduced daylight affects sleep timing, mood, and fatigue, showing general agreement with the article's conclusions.

InterestHigh interest

The posts reflect a high level of curiosity about how daylight influences sleep and mood, indicating strong interest in seasonal and circadian effects.

EngagementHigh engagement

Users actively quote and elaborate on specific findings, such as delayed sleep schedules and increased fatigue, demonstrating deep engagement with the research.

ImpactModerate impact

The discussions highlight the significance of understanding daylight’s role in health outcomes, implying that the study could influence future research or behavioral strategies.

Abstract in brief

  • The study compares how seasonal changes in daylight affect sleep patterns and mood in Ghana (near the equator) and Norway (far north), focusing on how day length influences circadian rhythms.
  • Results show that Norway experiences significant seasonal variations in sleep timing, insomnia, fatigue, and mood, while Ghana shows minimal changes, suggesting that daylight length is a key factor influencing these health aspects in higher latitudes.
  • Despite differences in daylight exposure, total sleep duration and sleep quality remained relatively stable across seasons in both countries, but reduced daylight was linked to delayed sleep schedules, increased sleep problems, fatigue, and depression, especially in Norway.]

Top posts

Most liked on X and Bluesky
⚡️ The Blue Light Diet ⚡️
@BlueLightDiet · X

Lack of daylight was related to phase-delayed rise- and bedtimes, increased problems falling asleep, daytime fatigue and depressive mood. https://t.co/1PrErMAxan

Jun 6, 2023 · 4 likes · 1 share · 32,641 followers View post →
Jonathan Cedernaes
@JCedernaes · X

@ProfKantermann @SleepAndSports ... and of course seasonal variation in sleep duration as well, which seems to transfer to sleep quality / symptoms of insomnia, https://t.co/ZkmMncs6QN Just highlighted chronotype given that I think many assume it to be extremely stable.

Jun 4, 2023 · 1 like · 3,127 followers View post →

All mentions

wice
@enjoyoutside · X

RT @BlueLightDiet: Lack of daylight was related to phase-delayed rise- and bedtimes, increased problems falling asleep, daytime fatigue and…

Jun 6, 2023 · 1 share · 342 followers View post →
⚡️ The Blue Light Diet ⚡️
@BlueLightDiet · X

Lack of daylight was related to phase-delayed rise- and bedtimes, increased problems falling asleep, daytime fatigue and depressive mood. https://t.co/1PrErMAxan

Jun 6, 2023 · 4 likes · 1 share · 32,641 followers View post →
Jonathan Cedernaes
@JCedernaes · X

@ProfKantermann @SleepAndSports ... and of course seasonal variation in sleep duration as well, which seems to transfer to sleep quality / symptoms of insomnia, https://t.co/ZkmMncs6QN Just highlighted chronotype given that I think many assume it to be extremely stable.

Jun 4, 2023 · 1 like · 3,127 followers View post →