Can the Wim Hof Method Help Women with Depression?
A randomized controlled clinical trial tested a Wim Hof Method intervention against an active control condition in 84 healthy midlife women with high stress and high depressive symptoms. The Wim Hof Method arm in this trial had two components: a breathing technique designed to induce intermittent hypoxia, and cold showers. The comparison arm used slow-paced breathing and warm showers. Both groups received daily audio instructions lasting 15 minutes for three weeks, during the COVID-19 pandemic in 2020 to 2021. The headline result is not that the Wim Hof Method won. It is that both conditions improved, and improved to the same degree.
Dr. Kumar’s Take
I went into this expecting the hormetic stress condition to separate from a gentler comparison, and it did not. Both arms produced equivalent reductions in depressive symptoms, anxiety symptoms, and perceived stress, and those reductions held at three months. Both arms also produced comparable reductions in cortisol reactivity to a laboratory stressor and in daily negative affect. That result is worth sitting with.
There is one place the Wim Hof condition did separate: participants in that arm reported significantly greater reductions in rumination after daily stressful events than the active control. The authors themselves call for replication in larger and more diverse samples before leaning on that finding, and I agree. One more detail that shapes how I read the whole trial: participants in the active control condition rated their intervention as more credible and expected greater mental wellbeing benefits than those in the Wim Hof condition. Expectancy usually runs the other way in these studies. Here the more novel, more demanding protocol was the less believed one, and it still matched the control rather than beating it.
Study Snapshot
Researchers randomized 84 healthy midlife women with high stress and high depressive symptoms to one of two conditions. Forty-one received the hormetic stress condition based on the Wim Hof Method, which involved a breathing technique designed to induce intermittent hypoxia plus cold showers. Forty-three received the active comparison condition of slow-paced breathing and warm showers. Both groups got daily audio instructions of 15 minutes for three weeks.
The primary outcomes were depressive symptoms, anxiety symptoms, and perceived stress, measured before the intervention, after it, and three months later. The investigators also collected daily diary reports of stress rumination and affect during the intervention, and had participants complete the Trier Social Stress Test in the laboratory before and after the intervention with salivary samples for cortisol reactivity.
Results in Real Numbers
Among participants who completed the intervention, both groups improved immediately afterward: a 24 percent reduction in depressive symptoms, a 27 percent reduction in anxiety symptoms, and a 20 percent reduction in perceived stress. Improvements were maintained at the three-month follow-up, with 46 percent of the sample reporting mild or no depressive symptoms.
Both conditions showed reduced daily negative affect across the intervention and lower peak cortisol reactivity to the laboratory stressor after the intervention.
Participants in the Wim Hof Method condition had significant reductions in rumination after daily stressful events compared with the active control group. This was the single outcome on which the two conditions differed.
Attrition was uneven. Six participants, 7 percent of the sample, dropped out, and all six were in the Wim Hof Method condition.
Who Benefits Most
The trial enrolled healthy midlife women with high stress and high depressive symptoms, so that is the group the findings speak to directly. Within that group, this study gives no reason to choose the Wim Hof protocol over slow-paced breathing for depressive symptoms, anxiety, or perceived stress. All three improved equally on either one.
If daily rumination after stressful events is the problem you are trying to solve, the Wim Hof condition is the one that showed an advantage here, and that advantage still needs replication.
For anyone weighing which protocol to actually start, the dropout pattern matters as much as the outcome data. Every dropout in this trial came from the Wim Hof arm. A practice you will keep doing for three weeks beats one you will abandon.
Safety, Limits, and Caveats
The Wim Hof breathing technique in this trial was designed to induce intermittent hypoxia. Breath-hold and hyperventilation practices carry real risk if done in water, while driving, or standing, and cold exposure is a cardiovascular stressor. Anyone with cardiovascular disease should talk to their physician before starting either component.
The design limits are worth naming. This was 84 healthy midlife women aged 30 to 60, an enrollment that says nothing about men or about other age groups. Women scoring in the severe major depression range were eligible only if they were already in therapy or on medication, so the trial does not speak to untreated severe depression either. The intervention ran during the COVID-19 pandemic, a period with its own trajectory of stress and recovery. Because both arms improved and there was no no-treatment arm, the trial cannot separate the effect of the practices from the passage of time and repeated contact with the study.
The differential dropout is a limitation in its own right, since the results among completers come from a group that was already selected for tolerating the protocol. And the authors are explicit that the rumination finding needs replication with larger and more diverse samples.
Practical Takeaways
- If you want the depressive symptom, anxiety, and perceived stress benefits seen in this trial, slow-paced breathing worked as well as the Wim Hof protocol. Pick the one you will actually do.
- The dose that was tested was 15 minutes daily for three weeks, delivered by audio instruction. That is a small, defined commitment, not an open-ended practice.
- The benefits in this trial persisted at three months after a three-week intervention, so a short structured block may be enough to start.
- If rumination after stressful events is your main symptom, the Wim Hof condition is where the advantage appeared, with the caveat that the finding is unreplicated.
- The warm shower and slow breathing version performed the same on the primary outcomes.
- Do not treat either protocol as a replacement for treatment of clinical depression. These were community participants with elevated symptoms, not a treatment trial in diagnosed major depressive disorder.
What This Means for Women’s Mental Health
The useful message from this trial is that two very different breathing and shower protocols produced the same sized improvement in depressive symptoms, anxiety, and perceived stress in midlife women with high stress, and the same reduction in cortisol reactivity to a laboratory stressor. That points toward the shared ingredients, daily structured breathwork practice with a defined 15 minute dose, rather than toward the cold or the hypoxia specifically.
It also complicates the expectancy story. The women in the gentler arm believed in their assigned intervention more, yet the arm they believed less in performed just as well. Belief did not decide the outcome here.
The rumination difference is the thread worth pulling on in future work, and the authors say so themselves. Until it replicates in larger and more diverse samples, I would treat it as a hypothesis rather than a reason to choose one protocol over the other.
Related Studies and Research
Episode 31: Depression Explained, The Biology Behind the Darkness
Episode 32: Depression Recovery Roadmap: A Step-by-Step, Evidence-Based Plan
Episode 34: The Natural Depression Treatment Doctors Don’t Tell You About
FAQs
Did the Wim Hof Method beat the comparison condition in this trial?
No. Counter to the preregistered predictions, the two conditions led to equivalent reductions in depressive symptoms, anxiety symptoms, and perceived stress, sustained at three months, and comparable reductions in cortisol reactivity and daily negative affect. The one difference was greater reduction in reported rumination after daily stressful events in the Wim Hof condition.
What did the intervention actually involve?
The Wim Hof condition combined a breathing technique designed to induce intermittent hypoxia with cold showers. The active comparison condition combined slow-paced breathing with warm showers. Both were delivered as 15 minutes of daily audio instruction for three weeks.
Did anyone drop out?
Six participants, 7 percent of the sample, dropped out, and all of them were in the Wim Hof Method condition.
Bottom Line
In 84 midlife women with high stress and high depressive symptoms, a Wim Hof Method protocol of intermittent hypoxic breathing plus cold showers produced the same improvements as slow-paced breathing plus warm showers: a 24 percent reduction in depressive symptoms, 27 percent in anxiety symptoms, and 20 percent in perceived stress, with 46 percent of the sample reporting mild or no depressive symptoms at three months. The Wim Hof condition reduced post-stressor rumination more than the control, a result the authors say needs replication, and it was also the only arm anyone dropped out of.
