ArticleNPJ digital medicine2020
Deviations from normal bedtimes are associated with short-term increases in resting heart rate.
Article in NPJ digital medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
19 citing papers in PubMed.
- Sleep Following a Stroke: Multimodal Evaluation of Sleep Health and Disruptions and Impact on Recovery During Acute Inpatient Rehabilitation.Neurorehabilitation and neural repair · 2025Trial
- The clinical value of circadian biofeedback in chronic heart failure.European heart journal. Digital health · 2026Article
- Non-invasive physiological indicators of welfare in dairy cows.Animal welfare (South Mimms, England) · 2026Article
- Article
- Using Free-Living Heart Rate Data as an Objective Method to Assess Physical Activity: A Scoping Review and Recommendations by the INTERLIVE-Network Targeting Consumer Wearables.Sports medicine (Auckland, N.Z.) · 2025Article
- Assessment of heart rate measurements by commercial wearable fitness trackers for early identification of metabolic syndrome risk.Scientific reports · 2024Article
- Associations between resting heart rate and cognitive decline in Chinese oldest old individuals: a longitudinal cohort study.BMC geriatrics · 2024Article
- Associations of Subjective Sleep Quality with Wearable Device-Derived Resting Heart Rate During REM Sleep and Non-REM Sleep in a Cohort of Japanese Office Workers.Nature and science of sleep · 2024Article
- Multifractal foundations of biomarker discovery for heart disease and stroke.Scientific reports · 2023Article
- Depression deconstructed: Wearables and passive digital phenotyping for analyzing individual symptoms.Behaviour research and therapy · 2023Article
- Article
- Knowledge Discovery in Ubiquitous and Personal Sleep Tracking: Scoping Review.JMIR mHealth and uHealth · 2023Article
- Heart Rate Variability and Chronotype in Young Adult Men.Healthcare (Basel, Switzerland) · 2022Article
- Article
- The Impact of Wearable Technologies in Health Research: Scoping Review.JMIR mHealth and uHealth · 2022Article
- HRS White Paper on Clinical Utilization of Digital Health Technology.Cardiovascular digital health journal · 2021Article
- A longitudinal analysis of COVID-19 lockdown stringency on sleep and resting heart rate measures across 20 countries.Scientific reports · 2021Article
- Trait-like nocturnal sleep behavior identified by combining wearable, phone-use, and self-report data.NPJ digital medicine · 2021Article
- What possibly affects nighttime heart rate? Conclusions from N-of-1 observational data.Digital healthArticle
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
Despite proper sleep hygiene being critical to our health, guidelines for improving sleep habits often focus on only a single component, namely, sleep duration. Recent works, however, have brought to light the importance of another aspect of sleep: bedtime regularity, given its ties to cognitive and metabolic health outcomes. To further our understanding of this often-neglected component of sleep, the objective of this work was to investigate the association between bedtime regularity and resting heart rate (RHR): an important biomarker for cardiovascular health. Utilizing Fitbit Charge HRs to measure bedtimes, sleep and RHR, 255,736 nights of data were collected from a cohort of 557 college students. We observed that going to bed even 30 minutes later than one's normal bedtime was associated with a significantly higher RHR throughout sleep (Coeff +0.18; 95% CI: +0.11, +0.26 bpm), persisting into the following day and converging with one's normal RHR in the early evening. Bedtimes of at least 1 hour earlier were also associated with significantly higher RHRs throughout sleep; however, they converged with one's normal rate by the end of the sleep session, not extending into the following day. These observations stress the importance of maintaining proper sleep habits, beyond sleep duration, as high variability in bedtimes may be detrimental to one's cardiovascular health.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.