Journal article
Core body temperature changes before sleep are associated with nocturnal heart rate variability
Journal of applied physiology (1985), Vol.135(1), pp.136-145
07/01/2023
DOI: 10.1152/japplphysiol.00020.2023
PMID: 37262106
Abstract
Core body temperature (CBT) reductions occur before and during the sleep period, with the extent of presleep reductions corresponding to sleep onset and quality. Presleep reductions in CBT coincide with increased cardiac parasympathetic activity measured via heart rate variability (HRV), and while this appears to persist into the sleep period, individual differences in presleep CBT decline and nocturnal HRV remain unexplored. The purpose of the current study was to assess the relationship between individual differences in presleep CBT reductions and nocturnal heart rate (HR) and HRV in a population of 15 objectively poor sleeping adults [10 males, 5 females; age, 33 +/- 4 yr; body mass index (BMI) 27 +/- 1 kg/m(2)] with the hypothesis that blunted CBT rate of decline would be associated with elevated HR and reduced nocturnal HRV. Following an adaptation night, all participants underwent an overnight, in-laboratory sleep study with simultaneous recording of polysomnographic sleep including electrocardiography (ECG) and CBT recording. Correlations between CBT rate of change before sleep and nocturnal HRV were assessed. Blunted rate of CBT decline was significantly associated with increased heart rate (HR) in stage 2 (N2; R = 0.754, P = 0.001), stage 3 (N3; R = 0.748, P = 0.001), and rapid-eye movement (REM; R = 0.735, P = 0.002). Similarly, blunted rate of CBT decline before sleep was associated with reduced HRV across sleep stages. These findings indicate a relationship between individual differences in presleep thermoregulatory processes and nocturnal cardiac autonomic function in poor sleeping adults.
Details
- Title: Subtitle
- Core body temperature changes before sleep are associated with nocturnal heart rate variability
- Creators
- Jeremy A. Bigalke - Montana State UniversityEmily L. Cleveland - Montana State UniversityElyse Barkstrom - Montana State UniversityJoshua E. Gonzalez - Michigan Technological UniversityJason R. Carter - Michigan Technological University
- Resource Type
- Journal article
- Publication Details
- Journal of applied physiology (1985), Vol.135(1), pp.136-145
- DOI
- 10.1152/japplphysiol.00020.2023
- PMID
- 37262106
- NLM abbreviation
- J Appl Physiol (1985)
- ISSN
- 8750-7587
- eISSN
- 1522-1601
- Publisher
- Amer Physiological Soc
- Number of pages
- 10
- Grant note
- AA-0024892; U54GM115371; P20GM103474 / National Institutes of Health; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA
- Language
- English
- Date published
- 07/01/2023
- Academic Unit
- Health, Sport, and Human Physiology
- Record Identifier
- 9985219853602771
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