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Variation in heart rate variability between sitting and standing postures under different ambient temperatures

The bulletin of the Yamaguchi Medical School Volume 69 Issue 3-4 Page 45-56
published_at 2022-12
A050069000303
[fulltext] 881 KB
Title
Variation in heart rate variability between sitting and standing postures under different ambient temperatures
Abstract
Abstract Purpose: The purpose of this study was to investigate the effects of two different postures (sitting and standing) and three different ambient temperatures (10℃, 20℃, and 30℃) on heart rate variability (HRV) among healthy young adults. Methods: Twelve young adult volunteers (males 6, females 6) were recruited. Following acclimatization to any the room temperature (10℃, 20℃ or 30℃), 5-min measurements of HRV were conducted in sitting and standing postures of the subjects. Results: Compared to the sitting posture, measurements obtained in the standing posture revealed a significant decrease in high-frequency power/HF, root mean square of successive differences between RR intervals, standard deviation of Poincaré plot perpendicular to the line-of-identity or SD1 and SD1/standard deviation of Poincaré plot along the line-of-identity or SD2, and a significant increase in lowfrequency power/LF and LF/HF under all experimental conditions (p<0.05 to 0.005). Majority of HRV parameters showed significant differences while the values obtained under 10℃ were compared with 20℃ and 30℃ conditions, respectively (p<0.05 to 0.001). Conclusions: Our findings suggest the predominance of sympathetic tone in the standing compared with sitting posture. Furthermore, colder conditions caused a predominance of the parasympathetic activity in both sitting and standing postures, and such effects of ambient temperature on the sympathovagal balance were stronger in the latter posture.
Creators Wada Sunao
Creators Mahbub MH
Affiliate Master Yamaguchi University
[kakenhi]15501 grid.268397.1
Creators Nakagami Yuki
Creators Hase Ryosuke
Affiliate Master Yamaguchi University
[kakenhi]15501 grid.268397.1
Creators Yamaguchi Natsu
Affiliate Master Yamaguchi University
[kakenhi]15501 grid.268397.1
Creators Takahashi Hidekazu
Creators Saito Hiroyuki
Affiliate Master Yamaguchi University
[kakenhi]15501 grid.268397.1
Creators Shimokawa Junki
Creators Watanabe Rie
Creators Harada Noriaki
Creators Tanabe Tsuyoshi
Affiliate Master Yamaguchi University
[kakenhi]15501 grid.268397.1
Source Identifiers [PISSN] 0513-1812 [EISSN] 2436-696X
Creator Keywords
heart rate variability posture ambient temperature
Languages eng
Resource Type departmental bulletin paper
Publishers Yamaguchi University School of Medicine
Date Issued 2022-12
File Version Version of Record
Access Rights open access
Schools 大学院医学系研究科(医学)