Research

What the evidence supports, and where it stops.

In October 2026 I presented a proposed framework on Reiki, slow breathing, and autonomic balance at the virtual International Reiki Research Conference. This page is the plain-language version.

It is a conceptual framework, not a finding. I report no primary data. I wrote it to be checked, and I would rather show you the gaps than hide them.

Reiki and breathwork are complementary practices. Nothing here is a claim to diagnose, treat, or cure, or a substitute for medical care.

The idea

A stress response with no off-signal.

Adapting to stress is healthy. The cost comes when the response is called on too often, for too long, or fails to switch off. Neuroscientist Bruce McEwen called that cumulative cost allostatic load. The problem, he argued, is not the stress response. It is the failure to terminate it.

My proposal is that frequent, low-stakes device signals (a notification, a badge count, an unread indicator) may trigger that response again and again with nothing physically at stake. I call this false sympathetic triggering. Any single instance is negligible. The proposed harm is in the accumulation.

This is a hypothesis. It has not been tested. Testing it is the point of the research agenda below.

The model

Four parts, graded honestly.

Each part acts on the stress system by a different route. They are listed here with how well each is supported, not how appealing each sounds.

Least evidenced

1 · Meter

Deliberately structure when and how often you engage your devices: batching, not continuous availability. It is the only part that acts on the proposed cause. The other three are recovery. It is also the least studied, so it is the part most in need of testing, not the one to lead with.

Best evidenced

2 · Breathe

Slow breathing near six breaths per minute is where heart rhythm and breathing align, and it is widely studied. Reiki has its own breath practice, held in Gassho. Bernardi and colleagues found that rosary and mantra recitation converge on about six breaths a minute without anyone designing them to. Whether Reiki’s breath practice lands there too has, as far as I could find, not been published.

Enabling

3 · Align

Sustained device use tends to produce a flexed posture: forward head, closed chest, shallow breathing. Gassho is close to the opposite: spine erect, chest open. Claim this carefully. The evidence links posture to mood and recall. The effect on the autonomic nervous system is inference.

Least understood

4 · Receive

Medical Reiki is the primary intervention here, and the part whose mechanism is least understood. Both of those statements are true at once, and I think a framework should say so.

The Reiki literature

What it supports, and what it does not.

An anchor study

Díaz-Rodríguez and colleagues (2011) ran a placebo-controlled, single-blind, crossover randomized trial in 21 health care professionals with burnout. After Reiki, heart rate variability (SDNN) and body temperature were significantly higher than after placebo, and a low-frequency measure was significantly lower. The authors read this as a parasympathetic effect. The limits: 21 people, a single session, measured immediately afterward.

Also reasonably supported

Reductions in pain and anxiety across randomized trials, with effect sizes calculated (Thrane & Cohen, 2014).
Effects in an animal model, where expectation cannot explain the result (Baldwin et al., 2008, in rats).

Not yet established

A durable change in autonomic baseline. The trials measure immediate effects after a session.
How it works. A link to parasympathetic markers is not an explanation.
Dose and response: how many sessions, how long, and how far apart.
Any effect specific to stress from digital devices. Nobody has studied it.

That second list is not a problem for the framework. It is the framework’s justification.

Reiki in clinical settings

Seven studies, with their limits.

These come from the reading list of my Medical Reiki certification. Most were done with patients (before surgery, in cancer care, before a procedure), and mainly measure pain and anxiety. They don’t tell us how Reiki works for someone who is simply worn out. The grades are my own plain-language judgement of study design, not a formal rating.

Moderate

Utli & Dinç (2023) · palliative care, Explore

Design: Single-blind randomized trial. 156 people with advanced (stage III–IV) cancer in palliative care, 52 per group: acupressure, Reiki, or control. Eight 20-minute sessions over four weeks.

Found: Pain, analgesic use, and fatigue fell over time in both treatment groups compared with control (each p < 0.001).

What it does not show: The control group received no matching attention, so expectation and the comfort of a calm visit can’t be separated from Reiki itself. Group means and effect sizes are not reported in the abstract.

doi:10.1016/j.explore.2022.11.007 (opens in a new tab)

Moderate

Utli & Yağmur (2022) · after hysterectomy, Explore

Design: Single-blind randomized trial. 102 women after abdominal hysterectomy, 34 per group: Reiki, back massage, or control. Twenty minutes, once a day.

Found: Pain intensity and analgesic use differed significantly in the Reiki group compared with the massage and control groups (p < 0.001), and vital signs tended to fall.

What it does not show: A single hospital-based setting, with no sham Reiki arm. Effect sizes are not reported in the abstract.

doi:10.1016/j.explore.2021.07.004 (opens in a new tab)

Moderate

Utli & Doğru (2023) · before endoscopy, Journal of PeriAnesthesia Nursing

Design: Single-blind, randomized, sham-controlled trial. 159 patients before upper gastrointestinal endoscopy: Reiki, sham Reiki, or control. One 20–25 minute session.

Found: The Reiki group showed a larger drop in stress and anxiety and a larger rise in comfort than the sham and control groups (p < 0.001).

What it does not show: One session, measured right away. The abstract does not report effect sizes or how many people were in each group.

doi:10.1016/j.jopan.2022.08.010 (opens in a new tab)

Preliminary

Chirico et al. (2017) · before breast cancer surgery, Anticancer Research

Design: Randomized controlled trial. 110 women with breast cancer in the pre-surgery phase, Reiki versus control.

Found: The effect of Reiki on anxiety and mood depended on the patient’s self-efficacy for coping with cancer. Women with higher self-efficacy showed a stronger effect.

What it does not show: The headline result is conditional, not a simple benefit for everyone. The abstract reports no effect sizes or group sizes.

doi:10.21873/anticanres.11736 (opens in a new tab)

Preliminary

Baldwin et al. (2017) · knee replacement, Holistic Nursing Practice

Design: Blinded, controlled pilot study. 46 patients having knee replacement: Reiki, sham Reiki, or standard care.

Found: Only the Reiki group showed significant reductions in pain, blood pressure, respiration rate, and state anxiety.

What it does not show: A small pilot. The authors conclude it supports a full-scale study, not that the question is settled.

doi:10.1097/HNP.0000000000000195 (opens in a new tab)

Preliminary

Buyukbayram & Saritas (2021) · oncology patients, Explore

Design: Non-randomized controlled study. 180 oncology patients, 60 per group: Reiki, guided imagery, or control. Three consecutive days.

Found: The authors report that both Reiki and guided imagery reduced pain and fatigue.

What it does not show: Without random assignment, the groups may have differed from the start. The abstract gives no means or p-values, so the size of the effect can’t be checked.

doi:10.1016/j.explore.2020.07.009 (opens in a new tab)

Limited

Dyer, Baldwin & Rand (2019) · private practices, Journal of Alternative and Complementary Medicine

Design: Single-group before-and-after study with no control group. About 1,400 sessions from 99 practitioners at private Reiki practices, rated by clients before and after each session.

Found: Clients reported significant improvements right after sessions in mood, pain, anxiety, and well-being.

What it does not show: With no comparison group, this can’t separate Reiki from expectation or from an hour of quiet. It shows that clients rate sessions well, which is valuable, but it is not evidence that Reiki is the cause.

doi:10.1089/acm.2019.0022 (opens in a new tab)

How to read these. Most compare Reiki with no treatment or usual care. Only two of the seven (Baldwin 2017 and Utli & Doğru 2023) used sham Reiki, which is the fairer test of whether the touch-free practice itself adds anything beyond attention and expectation. Most studies don’t say which style of Reiki was used, so I can’t claim these results for Usui Reiki specifically.

Grades: Moderate, randomized with a reasonable sample, but without full control for expectation (except where noted). Preliminary, small, conditional, or not randomized. Limited, no comparison group.

Measurement

One shared yardstick.

Heart rate variability (HRV) is the variation in time between heartbeats. It is non-invasive, works outside a lab, and is already accepted in cardiology, sports science, and psychophysiology. A single shared measure is what lets four different interventions be compared with each other, and be understood by a clinician.

I propose RMSSD as the primary measure. It is the cleanest short-recording proxy for vagal tone. I also propose avoiding the low-frequency band entirely when breathing is paced. At six breaths per minute, the breathing rhythm itself lands inside that band, so the number ends up reporting your breath, not your stress system.

Metric definitions follow the 1996 Task Force standards and Shaffer & Ginsberg (2017).

What comes next

Four studies, in order of feasibility.

1 · Characterise the practice

Measure breathing rate and RMSSD during Gassho breath practice in experienced practitioners. Does it converge near six per minute? Descriptive and low-risk. A chest belt, an HRV recorder, and a dozen willing practitioners would do it.

2 · Establish the phenomenon

Ambulatory HRV against logged device interaction. Show that digital exposure leaves an autonomic signature at all. No Reiki involved.

3 · Isolate the components

A design with breath-only, Reiki-only, and combined groups. Without it, the well-documented breath effect swallows any Reiki-specific contribution.

4 · Pre-register

Fix the primary measure and recording window in advance. This field’s credibility problem is partly a problem of flexible endpoints.

In closing

Not proof. A testable claim.

Reiki practitioners have described a shift in the nervous system for a century, in experiential language. HRV lets that description be checked, compared, and explained to people who will never use the word “biofield.” What this offers is not proof. It is a testable claim, a measure everyone already accepts, and a first study cheap enough to run.

For the breathing side, the free Blue Ember Breathwork app (opens in a new tab) has a library of cited studies, each described with its limits.

Book a session →

References

Sources.

Baldwin, A. L., Wagers, C., & Schwartz, G. E. (2008). Reiki improves heart rate homeostasis in laboratory rats. Journal of Alternative and Complementary Medicine, 14(4), 417–422. doi:10.1089/acm.2007.0753 (opens in a new tab)
Bernardi, L., et al. (2001). Effect of rosary prayer and yoga mantras on autonomic cardiovascular rhythms: Comparative study. BMJ, 323(7327), 1446–1449. doi:10.1136/bmj.323.7327.1446 (opens in a new tab)
Díaz-Rodríguez, L., et al. (2011). Immediate effects of Reiki on heart rate variability, cortisol levels, and body temperature in health care professionals with burnout. Biological Research for Nursing, 13(4), 376–382. doi:10.1177/1099800410389166 (opens in a new tab)
Lehrer, P. M., & Gevirtz, R. (2014). Heart rate variability biofeedback: How and why does it work? Frontiers in Psychology, 5, 756. doi:10.3389/fpsyg.2014.00756 (opens in a new tab)
Mark, G., Iqbal, S. T., Czerwinski, M., & Johns, P. (2014). Bored Mondays and focused afternoons: The rhythm of attention and online activity in the workplace. Proceedings of CHI ’14, 3025–3034. doi:10.1145/2556288.2557204 (opens in a new tab)
McEwen, B. S. (1998). Stress, adaptation, and disease: Allostasis and allostatic load. Annals of the New York Academy of Sciences, 840(1), 33–44. doi:10.1111/j.1749-6632.1998.tb09546.x (opens in a new tab)
Peper, E., Lin, I.-M., Harvey, R., & Perez, J. (2017). How posture affects memory recall and mood. Biofeedback, 45(2), 36–41. doi:10.5298/1081-5937-45.2.01 (opens in a new tab)
Shaffer, F., & Ginsberg, J. P. (2017). An overview of heart rate variability metrics and norms. Frontiers in Public Health, 5, 258. doi:10.3389/fpubh.2017.00258 (opens in a new tab)
Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology (1996). Heart rate variability: Standards of measurement, physiological interpretation, and clinical use. European Heart Journal, 17(3), 354–381. doi:10.1093/oxfordjournals.eurheartj.a014868 (opens in a new tab)
Thrane, S., & Cohen, S. M. (2014). Effect of Reiki therapy on pain and anxiety in adults: An in-depth literature review of randomized trials with effect size calculations. Pain Management Nursing, 15(4), 897–908. doi:10.1016/j.pmn.2013.07.008 (opens in a new tab)

Framework presented at the International Reiki Research Conference, October 3–4, 2026, hosted by the Center for Reiki Research. A conceptual and translational framework; no primary data reported.