Does heart rate variability biofeedback increase cardiorespiratory resting function during sleep?

本研究旨在探讨心率变异性生物反馈(HRV-BF)对日常生活中睡眠时心肺功能的影响。45名年轻人被随机分为三组：HRV-BF组、自体训练组(AT)和对照组。HRV-BF组的参与者被告知睡前使用BF设备，AT组的参与者被要求在睡前听取录音说明，而对照组的参与者被要求在睡前进行习惯性活动。连续3晚测量睡眠时脉搏波信号。基线数据在测量的第一个晚上收集，然后每种情况连续两个晚上收集。CRF以心率变异性高频成分的幅度作为评价指标。HRV-BF组的HF成分在睡眠期间增加，而AT组和对照组保持不变。提示睡前HRV-BF可改善睡眠中CRF。

The present study was designed to examine the effect of heart rate variability biofeedback (HRV-BF) on the cardiorespiratory resting function (CRF) during sleep in daily life. Forty-five young adults were randomly assigned to one of three groups: HRV-BF, Autogenic Training (AT), and control. Participants in the HRV-BF were told to use a BF device before bedtime, those in the AT were asked to listen to a recorded instruction before bedtime, and those in the control were asked to engage in habitual activity before bedtime. Pulse wave signal during sleep at their own residences was measured for 3 nights. Baseline data were collected on the 1st night of measurements, followed by 2 successive nights for each condition. CRF was assessed as the amplitude of high-frequency (HF) component of heart rate variability. HF component increased during sleep in the HRV-BF, although it remained unchanged in the AT and control. These results suggest that HRV-BF before sleep may improve CRF during sleep.