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Relaxation of social time pressure reveals tight coupling between daily sleep and eating behavior and extends the interval between last and first meal

2025-08-01Research article Open access
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dc.contributor.authorKorman, Maria
dc.contributor.authorFleischmann, Chen
dc.contributor.authorTkachev, Vadim
dc.contributor.authorReis, Cátia
dc.contributor.authorKomada, Yoko
dc.contributor.authorGubin, Denis
dc.contributor.authorKumar, Vinod
dc.contributor.authorKitamura, Shingo
dc.contributor.authorRoenneberg, Till
dc.date.accessioned2025-10-20T10:39:41Z
dc.date.available2025-10-20T10:39:41Z
dc.date.issued2025-08-01
dc.description.abstractStudy Objectives: As a day-active species, humans abstain from some or all foods and beverages and rest at night. The modern social clock diverged from the natural light–dark clock with far-stretching consequences for both fasting/eating and sleep/wake daily cycles. Methods: During the COVID-19 pandemic, prolonged social restrictions (SRs) offered a quasi-experimental protocol to directly test the impact of the relaxed social clock on eating and sleep behaviors and the coupling between them. Results: Using data from a global survey of 5747 adults (mean age 37.2 ± 13.7, 67.1% females, 100% worked/studied), we show that relaxation of the social time pressure (STP) during SRs led, on average, to a 42 min increase in the habitual fasting duration (FD, interval between the last and the first meal) (from 12:16 ± 2:09 to 12:57 ± 2:04) and a 34 min delay in the fasting window. FD was extended by lengthening both the presleep fasting and sleep durations. Pre-SR breakfast eaters delayed sleep and fasting, while breakfast skippers delayed sleep and advanced meals. Stopping alarm use on workdays was associated with a larger increase in FD. The correlations between chronotype, FD, and the mid-fasting time became more robust during SR. Conclusions: We conclude that relaxed STP extends habitual FD and promotes co-alignment of daily fasting and sleeping. Given the finding that the sleep-fasting phase relationship during SRs remained stable, we suggest that a “daily sleep-fasting structure” may be a novel circadian marker quantifying the coupling between daily rhythms. These results may inform strategies of public circadian health management.eng
dc.identifier.citationKorman, M., Fleischmann, C., Tkachev, V., & Reis, C. et al. (in press). Relaxation of social time pressure reveals tight coupling between daily sleep and eating behavior and extends the interval between last and first meal. Sleep. https://doi.org/10.1093/sleep/zsaf247
dc.identifier.doi10.1093/sleep/zsaf247
dc.identifier.issn0161-8105
dc.identifier.othere271188c-2188-4f88-8ab3-88c6e314e3e5
dc.identifier.pmid40832902
dc.identifier.urihttp://hdl.handle.net/10400.14/55393
dc.identifier.wos001588158500001
dc.language.isoeng
dc.peerreviewedyes
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectCircadian rhythms
dc.subjectDaily behavior
dc.subjectDaily schedules
dc.subjectNutrition
dc.subjectSocial time pressure
dc.titleRelaxation of social time pressure reveals tight coupling between daily sleep and eating behavior and extends the interval between last and first mealeng
dc.typeresearch article
dspace.entity.typePublication
oaire.citation.titleSleep
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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