ArticleJournal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine2025
Patterns of heart rate reduction during sleep onset in participants with and without insomnia.
Article in Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
STUDY
objectivesHyperarousal is common in patients with insomnia. Autonomic stress may reflect hyperarousal and distinguish participants with insomnia vs good sleepers. Slope analysis of heart rate reduction during sleep onset might be a promising measure of such autonomic modulation. We aim to explore the potential utility of this measure with data collected from home settings from the Sleep Heart Health Study.
methodsIn this secondary analysis with 743 participants, we applied 2 approaches to compute slopes for heart rate reduction during sleep onset. We compared slopes among participants with and without insomnia symptoms, with short vs long sleep onset latency, with or without difficulty falling asleep during the study night, and with sleep-onset insomnia vs other insomnia subtypes. We also explored correlations between heart rate reduction and sleep outcome measures.
resultsWe found that the slopes of heart rate reduction during sleep onset were most significantly associated with objectively measured sleep onset latency, followed by self-reported sleep onset latency, regardless of the approach used to compute the slopes. Participants with self-reported difficulty falling asleep during the study night had significantly blunted heart rate reduction. The slopes were significantly blunted in participants with self-reported sleep-onset insomnia compared to other types of insomnia.
conclusionsAs measures of autonomic activity, the slopes of heart rate reduction may serve as a physiological biomarker to indicate hyperarousal during wakefulness before sleep onset. Tracking changes of heart rate reduction during sleep onset may have potential value in the evaluation of insomnia treatments, especially those targeting sleep onset difficulties. CITATION: Ma Y, Wayne PM, Mullington JM, Yeh GY. Patterns of heart rate reduction during sleep onset in participants with and without insomnia.
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