Department of Educational and Health Psychology, University of Education Schwäbisch Gmünd, Oberbettringerstraße 200, 73525 Schwäbisch Gmünd, Germany.
Int J Environ Res Public Health. 2021 Oct 28;18(21):11357. doi: 10.3390/ijerph182111357.
The aim of this study was to examine whether it is possible to gradually increase heart rate variability (HRV) in healthy individuals (21 participants, = 21.24 years, = 1.57, range 19 to 26) through regular exercises of average resonance frequency training (RFT; 6 breaths/min; 5 min each day) and progressive muscle relaxation (PMR; three times a week for 20 min). The effects were tested against an active control group using a linear mixed effect model with random slopes (day), random intercepts (participants) and an autoregressive error term. The special feature of this pilot study is that HRV was measured every day in an ambulatory assessment over 77 days, so that graduate long-term effects on HRV can be mapped. The results indicated that the PMR group significantly increased their HRV compared to the active control group. However, no effect was observed for the RFT group. Possible explanations for these results and important recommendations for subsequent studies are provided.
本研究旨在探讨通过定期进行平均共振频率训练（RFT；6 次呼吸/分钟；每天 5 分钟）和渐进性肌肉放松（PMR；每周 3 次，每次 20 分钟），是否可以使健康个体（21 名参与者， = 21.24 岁， = 1.57，范围 19 至 26）的心率变异性（HRV）逐渐增加。使用具有随机斜率（天）、随机截距（参与者）和自回归误差项的线性混合效应模型，将效果与主动对照组进行了比较。本初步研究的一个特点是，在 77 天的动态评估中，每天测量 HRV，以便可以绘制 HRV 的长期影响。结果表明，PMR 组与主动对照组相比，HRV 显著增加。然而，RFT 组没有观察到效果。对这些结果的可能解释以及对后续研究的重要建议提供了。
