Research: Reiki and Psychophysiological Regulation

Reiki is a touch-based complementary practice used in healthcare settings to support relaxation and stress recovery. While traditionally described in energetic terms, research has focused primarily on its measurable psychophysiological effects.

In addition to my clinical psychotherapy work, I directed a Reiki Volunteer Program at Mountainside Medical Center for three years. During that time, I observed how structured, touch-based practices can support relaxation, reduce anxiety, and foster relational presence in medical settings.

While large-scale randomized trials remain limited, smaller controlled studies and meta-analyses suggest that Reiki reliably evokes the relaxation response and may improve quality-of-life indicators.

Research conducted by David McManus, Ph.D., affiliated with the University of Massachusetts Medical School, found evidence that Reiki has measurable effects on autonomic regulation and may be more effective than placebo in reducing pain and anxiety in certain populations (McManus, 2017).

The available data suggest that Reiki’s primary measurable effects occur at the level of psychophysiological regulation. Studies have demonstrated reductions in heart rate and blood pressure, along with increases in heart rate variability (HRV), a marker associated with flexibility and resilience in stress response systems.

Observed increases in heart rate variability suggest improved parasympathetic regulation. The vagus nerve contributes to parasympathetic modulation of heart rate, offering one plausible framework for interpreting these findings—though mechanisms remain an active area for research.

Improved HRV is correlated with emotional regulation, reduced pain sensitivity, and enhanced well-being. These findings suggest that Reiki may support parasympathetic activation and recovery from chronic stress states.

Researchers have proposed that models such as Polyvagal Theory offer one framework for understanding these effects. While further research is needed to clarify mechanisms and dosage, current findings indicate that Reiki may serve as a complementary intervention for stress-related and chronic health conditions.

Update (2024–2025): Since this article was first written, additional reviews and clinical studies have been published. Recent systematic reviews continue to report that Reiki is associated with reductions in anxiety and improvements in quality-of-life measures across several populations, while also emphasizing variability in study design and the need for more rigorous trials.

While additional rigorous research is needed to clarify mechanisms and optimal dosing, current findings suggest that Reiki reliably supports relaxation and psychophysiological regulation. In clinical settings, this shift toward steadiness can create conditions that allow pain reduction, emotional processing, and recovery to unfold more effectively.

When integrated within ethical, standardized frameworks, Reiki may serve as a complementary component of comprehensive care.

Sources

Arıkan E., Bahçecioğlu Turan, G.B. (2024). The effects of Reiki application on sleep and quality of life in patients with epilepsy, Epilepsy & Behavior, V59(109938),

https://doi.org/10.1016/j.yebeh.2024.109938.

Guo, X., Long, Y., Qin, Z., & Fan, Y. (2024). Therapeutic effects of Reiki on interventions for anxiety: a meta-analysis. BMC palliative care, 23(1), 147. https://doi.org/10.1186/s12904-024-01439-x

Liu, K., Qin, Z., Qin, Y., Li, Y., Liu, Q., Gao, F., Zhang, P., & Wang, W. (2025). Effects of Reiki therapy on quality of life: a meta-analysis of randomized controlled trials. Systematic reviews, 14(1), 72. https://doi.org/10.1186/s13643-025-02811-5

McManus, D. (2017). Reiki Is Better Than Placebo and Has Broad Potential as a Complementary Health Therapy. Journal of evidence-based complementary & alternative medicine, 22(4), 1051-1057.