Low-altitude Mountain Tourism Increases Overall Heart Rate Variability and Decreases Heart Rate and Blood Pressures in Healthy Adults
|Chen-Hsu Wang1-3, Audrey Ming-Li Fan1, Chen Lin4,5 and Cheng-Deng Kuo1*|
|1Laboratory of Biophysics, Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan|
|2Graduate Institute of Translational and Interdisciplinary Medicine, National Central University, Taoyuan, Taiwan|
|3Medical Intensive Care Unit, Division of Cardiology, Department of Internal Medicine, Cathay General Hospital, Taipei, Taiwan|
|4Research Center for Adaptive Data Analysis, National Central University, Taoyuan, Taiwan|
|5Center for Dynamical Biomarkers and Translational Medicine, National Central University, Taoyuan, Taiwan|
|Corresponding Author :||Cheng-Deng Kuo
Laboratory of Biophysics
Department of Medical Research
Taipei Veterans General Hospital
Taipei 112, Taiwan
E-mail: [email protected]
|Received December 22, 2014; Accepted January 28, 2015; Published January 31, 2015|
|Citation: Wang CH, Fan AM, Lin C, Kuo CD (2015) Low-altitude Mountain Tourism Increases Overall Heart Rate Variability and Decreases Heart Rate and Blood Pressures in Healthy Adults. J Clin Exp Cardiolog 6:357. doi:10.4172/2155-9880.1000357|
|Copyright: © 2015 Wang CH. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.|
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Background: People often feel comfort and relaxation during low-altitude mountain tourism below 1500 meters above sea level (MASL). But the real effects of low-altitude mountain tourism on humans are not well understood.
Methods: Three different low-altitude locations (30, 520 and 1080 MASL) were chosen for Heart Rate Variability (HRV) and hemodynamic analyses in 49 healthy adults.
Results: The Heart Rate (HR) and Blood Pressures (BP) were decreased, whereas the Standard Deviation (SDRR) and Coefficient of Variation (CVRR) of RR intervals, Total Power (TP), Low-Frequency Power (LFP) and High-Frequency Power (HFP) of HRV were increased at 520 and 1080 MASL, as compared with those at 30 MASL. The age of subjects correlated negatively with SDRR, CVRR, TP and HFP, and correlated positively with normalized very-low-frequency power as altitude increased. Male subjects had a higher SDRR, CVRR, TP and LFP at 520 MASL, and a lower Systolic Blood Pressure (SBP) at 1080 MASL. The SBP, mean arterial blood pressure and pulse pressure were significantly decreased when the old subjects ascended from 30 MASL to a higher altitude. This phenomenon was not found in the young subjects. The BP of the old subjects can be decreased to more extent than the young subjects by traveling in the low-altitude mountain area.
Conclusion: Low-altitude wilderness tourism within 1080 MASL can lead to a decrease in HR and BP, and an increase in overall HRV. The greatest decrease in HR and BP and the greatest increase in overall HRV occur at around 520 MASL. Male subjects have higher overall HRV and low-frequency components than females at 520 MASL. Travel in low-altitude mountain area may be good to physiological fitness for healthy adults in terms of automatic nervous modulation and blood pressure regulation, especially in the older people.