Integrating Breathing Techniques Into Psychotherapy to Improve HRV: Which Approach Is Best?

Patrick R Steffen, Derek Bartlett, Rachel Marie Channell, Katelyn Jackman, Mikel Cressman, John Bills, Meredith Pescatello, Patrick R Steffen, Derek Bartlett, Rachel Marie Channell, Katelyn Jackman, Mikel Cressman, John Bills, Meredith Pescatello

Abstract

Introduction: Approaches to improve heart rate variability and reduce stress such as breathing retraining are more frequently being integrated into psychotherapy but little research on their effectiveness has been done to date. Specifically, no studies to date have directly compared using a breathing pacer at 6 breaths per minute with compassion focused soothing rhythm breathing.

Current study: In this randomized controlled experiment, 6 breaths per minute breathing using a pacer was compared with compassion focused soothing rhythm breathing, with a nature video being used as a control group condition.

Methods: Heart rate variability (HRV) measures were assessed via electrocardiogram (ECG) and respiration belt, and an automated blood pressure machine was used to measure systolic diastolic blood pressure, and heart rate (HR). A total of 96 participants were randomized into the three conditions. Following a 5-min baseline, participants engaged in either 6 breath per minute breathing, soothing rhythm breathing, or watched a nature video for 10 min. To induce a stressful state, participants then wrote for 5 min about a time they felt intensely self-critical. Participants then wrote for 5 min about a time they felt self-compassionate, and the experiment ended with a 10-min recovery period.

Results: Conditions did not significantly differ at baseline. Overall, HRV, as measured by standard deviation of NN intervals (SDNN), low frequency HRV (LF HRV), and LF/HF ratio, increased during the intervention period, decreased during self-critical writing, and then returned to baseline levels during the recovery period. High frequency HRV (HF HRV) was not impacted by any of the interventions. The participants in the 6 breath per minute pacer condition were unable to consistently breathe at that rate and averaged about 12 breaths per minute. Time by Condition analyses revealed that both the 6 breaths per minute pacer and soothing breathing rhythm conditions lead to significantly higher SDNN than the nature video condition during breathing practice but there were no significant differences between conditions in response to the self-critical and self-compassionate writing or recovery periods. The 6 breath per minute pacer condition demonstrated a higher LF HRV and LF/HF ratio than the soothing rhythm breathing condition, and both intervention conditions had a higher LF HRV and LF/HF ratio than the nature video.

Conclusions: Although the 6 breath per minute pacer condition participants were not able to breath consistently at the low pace, both the participants attempting to breathe at 6 breaths per minute as well as those in the soothing rhythm breathing condition effectively increased HR variability as measured by SDNN, and attempting to breathe at 6 breaths per minute led to the highest LF HRV and LF/HF ratio. Both breathing approaches impacted HRV more than watching a relaxing nature video and can potentially be used as key adjuncts in psychotherapy to aid in regulating physiological functioning, although it appears that consistent breathing practice would be needed.

Keywords: 6 breath per minute breathing; HRV; biofeedback; psychotherapy; soothing rhythm breathing.

Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Copyright © 2021 Steffen, Bartlett, Channell, Jackman, Cressman, Bills and Pescatello.

Figures

FIGURE 1
FIGURE 1
SDNN change over experimental tasks by experimental group with standard error bars. The 6 breath per minute and soothing rhythm breathing conditions both increased significantly during the breathing practice, whereas the nature video did not change.
FIGURE 2
FIGURE 2
LF/HF ratio change over experimental tasks by experimental group with standard error bars. The 6 breath per minute and soothing rhythm breathing conditions both increased significantly during the breathing practice, whereas the nature video did not change, and the 6 breath per minute group increased significantly more than the soothing rhythm breathing.

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