Feketa V P, Gleba L A, Palamarchuk O S, Savka Ju M, Kivezhdi K B
Fiziol Zh (1994). 2016;62(4):66-75. doi: 10.15407/fz62.04.066.
The research is an attempt to explain the use of portable computer devices aiming to correct heart rate variability (HRV) of healthy young men. According to the data, used deep diaphragmatic breathing in mode of biofeedback harmonizes breathing and blood circulation which positively affects the body's adaptive potential. However, developers present the portable instruments of biofeedback primarily as a means of psychological relaxation. The aim of this study is to determine whether such devices are able to significantly affect heart rate variability and how long this effect lasts. There were 30 males aged 18 to 20 years that participated in this study. They were randomly divided into three equal groups with up to 10 people in each of them. Members of the first group were doing breathing exercises using a portable biofeedback StressEraser device, the second group used Em-Wave2, and the third one used hardware and software system MyCalmBeat. Each session lasted from 10 to 15 minutes. There were 10 sessions held daily in the morning. HRV was recorded by remote heart rate monitor Polar RS800CX and software Polar ProTrainer5. 5-minutes' stationary segments of the curve chest electrocardiogram removal were used in order to calculate the HRV indexes. It was found that 15 minutes deep breathing in mode of biofeedback significantly affects the heart rate variability of healthy young people. In particular, it increases the overall heart rate variability according to the statistical and spectral analysis. It was established that in all 3 groups of experiment participants the spectral curve low-range "Low frequency" (LF) suffered the major shifts. These shifts reflect the activity level of the sympathetic autonomic nervous system (ANS) as well as vascular-motor center according to the conventional interpretation. It was found that all three groups suffered a specific weight decrease of Very Low Frequency (VLF)% respectively 11.8±2.2%;(p <0,01); 6.6 ± 2.8%; (p <0,02) and 6.8 ± 2.4% (p <0,05). This means that activity redistribution between different regulatory components of heart rate occurred in favour of the peripheral ANS parts. Heart rate variability changes of this kind remained valid for at least one month after the experiment. The greatest influence on heart rate variability was observed in the group of people who used the device StressEraser.
该研究旨在解释便携式计算机设备对健康年轻男性心率变异性（HRV）的校正作用。数据显示，在生物反馈模式下进行深度横膈膜呼吸可协调呼吸与血液循环，对身体的适应潜能产生积极影响。然而，开发者主要将生物反馈便携式仪器作为一种心理放松手段。本研究的目的是确定此类设备是否能显著影响心率变异性以及这种影响能持续多久。有30名年龄在18至20岁的男性参与了这项研究。他们被随机分为三个相等的组，每组最多10人。第一组成员使用便携式生物反馈压力消除器（StressEraser）设备进行呼吸练习，第二组使用Em-Wave2，第三组使用硬件和软件系统MyCalmBeat。每次训练持续10至15分钟。每天上午进行10次训练。通过远程心率监测仪Polar RS800CX和软件Polar ProTrainer5记录HRV。为计算HRV指标，采用了5分钟的静息段胸部心电图曲线去除数据。研究发现，在生物反馈模式下进行15分钟的深呼吸对健康年轻人的心率变异性有显著影响。特别是，根据统计和频谱分析，它增加了整体心率变异性。研究确定，在所有3组实验参与者中，频谱曲线的低频“低频”（LF）部分发生了主要变化。根据传统解释，这些变化反映了交感自主神经系统（ANS）以及血管运动中枢的活动水平。研究发现，所有三组的极低频（VLF）%的特定权重分别下降了11.8±2.2%；（p<0.01）；6.6±2.8%；（p<0.02）和6.8±2.4%（p<0.05）。这意味着心率不同调节成分之间的活动重新分布有利于外周ANS部分。这种心率变异性变化在实验结束后至少一个月内仍然有效。在使用压力消除器设备的人群中观察到对心率变异性的影响最大。
