Research AppraisalRandomised Controlled Trial

Hypnotic safety suggestions reduce cortisol awakening response and morning heart rate in daily life.

Scientific reportsSchmidt, Barbara, Riede, Michael, Walter, Martin et al.8 May 2026DOI

Clinical Snapshot

55CEBM
Evidence: WeakRandomised Controlled Trial

PICO Framework

P — Population80 healthy adults (40 female, 40 male) recruited for stress intervention study
I — InterventionSingle session of Jena Safety Anchor hypnosis-based intervention
C — ComparatorControl group receiving no intervention (laboratory visit only)
O — OutcomesPrimary: cortisol awakening response (CAR) and morning heart rate (6-9am) measured over 2 weeks via saliva samples and continuous smartwatch monitoring

Bottom Line

This RCT suggests that a single hypnosis session (Jena Safety Anchor) may reduce physiological stress markers in healthy adults, as measured by cortisol awakening response and morning heart rate over two weeks. While the intervention appears promising for its brevity and non-invasive nature, the study has significant methodological limitations including lack of blinding, unclear randomisation procedures, and insufficient statistical reporting. The ecological validity of home-based measurements is a strength, but clinicians should await full publication with complete methodology and results before considering implementation. The intervention's low risk profile and potential for integration into routine care make it worthy of further investigation, but current evidence is insufficient to support routine clinical use.

Evidence: Weak

Key Findings

  • P Value: Described as 'significant' but specific values not provided

  • Effect Size: Not reported in abstract

  • Primary Outcome: Significant reduction in cortisol awakening response and morning heart rate in hypnosis group during week 2 post-intervention

  • Nnt Or Sensitivity: Not calculable from available data

  • Confidence Interval: Not reported in abstract

Clinical Application

High feasibility - single session intervention with minimal training requirements for practitioners Relevant to Australian primary care and mental health settings; could complement existing stress management approaches under Medicare-funded psychological services Healthy adults experiencing anticipatory stress or seeking stress management interventions

Abstract

With stress being causally linked to the most frequently occurring mental and physical health problems, effective coping with acute stress is essential for promoting overall well-being and building long-term stress resilience. However, most interventions aimed at improving stress regulation require extended periods of training and practice. In a previous study, we demonstrated that the Jena Safety Anchor-a brief, hypnosis-based intervention-effectively reduced subjective stress responses in a controlled laboratory setting using the Trier Social Stress Test (TSST). The present study examined whether this effect extends to everyday life. A total of 80 participants (n = 40 female) were randomly assigned to either a hypnosis group or a control group (n = 40 per group). Over the course of two weeks, all participants collected saliva samples at home to assess their cortisol awakening response (CAR), an indicator of anticipatory stress, reflecting the body's preparation for expected demands upon waking. Additionally, all participants continuously recorded their heart rate via smartwatches during the two data collection weeks. The hypnosis group received a single guided session of the Jena Safety Anchor at the end of the first week, while the control group came to the laboratory but received no intervention. CAR was measured via three saliva samples taken within one hour after waking on specified days. Morning heart rate was measured between 6 and 9 a.m. Results revealed a significant reduction in CAR and morning heart rate in the hypnosis group during the second week, following the intervention. In contrast, no change in CAR and morning heart rate was observed in the control group. These findings show that a single session of the Jena Safety Anchor can effectively reduce physiological stress anticipation in the morning. This points to its potential as a rapid, low-effort intervention for enhancing stress coping and fostering resilience. It offers a promising approach to mental health promotion that is both time-efficient and easily integrated into everyday routines.

References

  1. 1.Schmidt, B., Riede, M., Walter, M., & Engert, V. (2026). Hypnotic safety suggestions reduce cortisol awakening response and morning heart rate in daily life. Scientific Reports. https://doi.org/10.3389/fpsyg.2022.917139
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