Age‐related circulatory responses to whole body cooling: observations by heart rate variability

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Abstract

The purpose was to study potential age ‐ related changes in the circulatory system via heart rate variability (HRV) by gradually lowering ambient temperature (0.2°C/min) from thermoneutral (32 C°) towards cold (18 C°). ECG was recorded from a young (31 years) and from an older subject (78 years), both males. During the tests, brachium blood pressure (BP) was recorded.
During the cooling, BP increased in both subjects (young from 95/69 to 132/75 mmHg, old from 125/68 to 176/101 mmHg), the latter exhibiting a prominent rise in diastolic values after cooling. HRV parameters increased in both subjects during the cold exposure being modest in the younger subject as compared to the older one. Also, recovery from the cold in terms of HRV was faster in the younger subject. The present preliminary observations indicate that older age is coupled with altered HRV response to a mild whole‐body skin cooling.

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Subject classification (UKÄ) – MANDATORY

  • Production Engineering, Human Work Science and Ergonomics

Keywords

  • ECG heart rate variability elderly thermal balance mild whole‐body cooling blood pressure
Original languageEnglish
Pages (from-to)57-64
JournalFinnish Journal of eHealth and eWelfare
Volume7
Issue number2-3
Publication statusPublished - 2015
Publication categoryResearch
Peer-reviewedYes