What meditation groups can do, and what they can stir up

Key takeaways

• In a 2022 trial of 276 adults with anxiety disorders, an eight-week group mindfulness course worked about as well as the drug escitalopram, with far fewer side effects.
• A pooled analysis of nine trials found that group mindfulness-based cognitive therapy lowered the risk of depression relapse by about 31% compared with people who didn’t take it.
• In one small study, how people rated their teacher and their group predicted drops in depression and stress better than how many minutes they meditated.
• Meditation can stir up anxiety or worse in some people, especially around intensive retreats, so ask any teacher how they handle hard experiences.
• A 1993 Washington, D.C., study behind the claim that group meditation lowers city crime has serious design limits, so the evidence is not enough to support it.

In 2018, researchers at Georgetown University Medical Center, NYU Langone and Massachusetts General Hospital began a head-to-head test¹. Adults with anxiety disorders were assigned by chance to one of two treatments. One group took escitalopram, a widely used antidepressant. The other joined an eight-week class in mindfulness-based stress reduction, or MBSR.

After eight weeks, both groups had improved by almost the same amount¹. The real gap was in side effects. About 79% of people on the drug reported a study-related side effect, compared with about 15% of people in the classes.

That trial, published in JAMA Psychiatry in late 2022, tested something easy to miss. MBSR isn’t an app or a solo habit. It’s a group: the same people and the same teacher, week after week.

Meditating alone costs nothing, but many people find it hard to keep up. A group adds structure, a teacher and company.

It also raises new questions. Who is teaching? What does it cost? And what happens if sitting still stirs up something painful?

This guide answers those questions with the research, rated on a four-level evidence scale.

Meditation is now more common in the U.S. than yoga

Federal survey data show how fast meditation has spread. The share of U.S. adults who meditated rose from 7.5% in 2002 to 17.3% in 2022, according to the National Center for Complementary and Integrative Health (NCCIH)². By 2022 it was the most used of the seven complementary approaches in the survey, ahead of yoga.

“Meditation” covers many practices. Some focus attention on the breath, a sound, an image or a mantra, a word or phrase said over and over². Mindfulness means paying attention to the present moment without judging it.

Two group programs dominate the research. Jon Kabat-Zinn founded MBSR in 1979, and today it serves people dealing with stress, pain and illness³. Mindfulness-based cognitive therapy (MBCT), developed by Zindel Segal, Mark Williams and John Teasdale, adapts MBSR for people with recurring depression. It adds tools from cognitive therapy, a talk therapy that works with thought patterns.

Both programs run eight weeks and start with an orientation³. At Brown University’s Mindfulness Center, MBSR classes usually hold about 20 to 35 people, while MBCT groups are capped at 24.

The evidence is strongest for anxiety and depression relapse

In 2014, researchers reviewing 47 randomized trials with 3,515 adults reported their findings in JAMA Internal Medicine⁴. Randomized trials, where people are assigned to treatments by chance, are the fairest test of whether something works. The review found moderate evidence that mindfulness programs ease anxiety, depression and pain.

It also found no sign that meditation beat other active treatments, such as drugs, exercise or other behavioral therapies⁴. That’s the honest middle ground: mindfulness works about as well as several good options, not better.

For depression that keeps coming back, MBCT has a solid record. In 2016, researchers led by Kuyken pooled data on individual patients from nine trials, also in JAMA Psychiatry⁵. Over 60 weeks, people who took MBCT had about a 31% lower risk of relapse than people who didn’t, a comparison group that mixed usual care with other treatments.

Compared with other active treatments alone, including antidepressants, MBCT still came out ahead, with about a 21% lower relapse risk⁵. People with more leftover symptoms seemed to gain more, a finding the authors stated cautiously.

The anxiety trial adds weight, with limits¹. It lasted only eight weeks. The COVID-19 pandemic also stopped enrollment early, at 276 of the 368 people planned.

For other problems, the picture is mixed. NCCIH reports a possible benefit for blood pressure, short-term help for low-back pain, and better sleep quality than education-based programs, though not better than cognitive behavioral therapy or exercise². A small 2019 review of headache studies found no drop in how often, how long or how badly headaches struck.

Claim	Evidence level	What the research shows
Mindfulness courses ease anxiety and depression symptoms	Strong evidence	Small to moderate effects across 47 trials; about equal to other active treatments4
Group MBCT helps prevent depression relapse	Strong evidence	Lower relapse risk across nine trials, including against antidepressants5
Eight weeks of MBSR matches an antidepressant for anxiety disorders	Promising but early	One large trial, eight weeks long, stopped early1
Mindfulness lowers blood pressure	Promising but early	Possible benefit; the size and type of effect are unsettled2
Mindfulness eases low-back pain	Promising but early	Short-term benefit in reviews2
Meditation reduces headaches	Evidence says no	No reduction so far in a review of five small studies, which its authors called preliminary2
Group meditation lowers city crime	Not enough evidence	The 1993 Washington study is observational, in one city, and depends on its model14

Why the group may matter as much as the meditation

A 2021 study in Frontiers in Psychology, led by Nicholas Canby, followed 96 adults with depression or anxiety through an eight-week mindfulness course⁶. The researchers tracked how many minutes each person meditated. They also asked people to rate their teacher and their group.

The social ratings turned out to matter a lot. How people rated their teacher predicted drops in depression and stress. How they rated their group predicted drops in stress⁶.

Minutes of formal practice predicted some gains too, in anxiety and stress. But for depression and stress, the social ratings were the stronger predictors.

About three in four of the people interviewed afterward brought up the group itself. The authors concluded that course results can’t be credited to meditation practice alone, and that social factors may explain much of the benefit⁶. It’s one small study, so treat it as a strong clue rather than the final word.

Compare that with apps. A 2019 study in the Journal of Medical Internet Research tracked real-world use of 93 popular mental health apps⁷. For mindfulness and meditation apps, a median of only about 4.7% of users were still opening them 30 days after install.

That measures use, not benefit, so it doesn’t prove apps fail. But it shows the gap a group can fill: a teacher, people who expect you, and a place to talk about what comes up.

Not every meditation group is the same kind of group

Meditation groups range from hospital classrooms to temple halls. Knowing the type helps you set the right expectations.

Eight-week secular courses follow a set curriculum. Brown’s MBSR course meets 2.5 hours a week, adds an all-day session after the fifth class, and runs online or in person⁸. As of October 2026, it listed tuition of $599 online and $650 in person. The version tested in the anxiety trial asked for 45 minutes of home practice a day¹.

Religious and traditional communities often work differently. At the Insight Meditation Society, a Buddhist meditation retreat center, fees cover meals and lodging on a sliding scale⁹. Most teachers at its retreat center aren’t paid for teaching and rely on donations, a custom called dana, the Pali word for generosity. The center says about a third of retreatants get financial help.

Silent retreats ask the most of you. The Insight Meditation Society asks retreatants to keep “noble silence,” which means no talking, reading, writing or phone use¹⁰.

Group type	What it usually looks like	Good to know
Eight-week MBSR or MBCT course	Weekly class, home practice, one day-long session	Best-studied option; tuition often applies
Drop-in community sitting group	Short guided or silent sit, sometimes a talk	May be free or by donation; quality varies
Religious or traditional community	Practice within a spiritual tradition	Ask what beliefs or commitments are expected
Silent residential retreat	Days or weeks of silence and long sits	Highest intensity; not a starting point for most beginners
Workplace or clinic program	Short courses tied to an employer or health system	Ask who designed it and who teaches it

Meditation can stir up distress, and good teachers plan for it

NCCIH calls meditation generally low risk, while pointing out that researchers have rarely gone looking for harm². When a 2020 review pooled 83 studies, roughly 1 in 12 people reported an unwanted effect from meditating, about the same share seen with talk therapies. Anxiety and depression topped the list.

Closer looks find more. In a 2021 study of 96 people taking MBCT, Willoughby Britton and colleagues asked detailed questions about meditation-related effects¹¹. About 37% said meditation had some negative effect on their daily functioning. Between 6% and 14% reported lasting bad effects, often tied to feeling keyed up or to dissociation, a sense of being detached from yourself or your surroundings.

The authors described the distress as mostly short-lived, at rates similar to other psychological treatments¹¹. Part of the reason the numbers differ from study to study is that each one asked different questions.

Intensity seems to matter. A 2019 survey of 1,232 regular meditators in PLOS ONE found that 25.6% reported a particularly unpleasant experience they thought meditation may have caused¹². People who had attended a retreat had 68% higher odds of such reports.

A 2017 interview study of 60 Western Buddhist practitioners found fear, anxiety, panic or paranoia was the most common challenging experience¹³. For 72% of them, the challenges came during or just after a retreat.

Experienced centers plan for this. The Insight Meditation Society warns that a silent retreat may be a poor fit, for now, for anyone with recent serious trauma, significant depression or anxiety, or strong PTSD symptoms. It suggests a therapist can help you pick a shorter retreat or a later date¹⁰. Retreatants must bring enough medicine for the whole stay, and stopping a prescribed drug mid-retreat is grounds for being asked to leave.

The claim that group meditation lowers crime

You may hear that large groups meditating together can lower crime in a whole city. One study behind this claim, called the National Demonstration Project, took place in Washington, D.C., from June 7 to July 30, 1993¹⁴. About 4,000 people practicing Transcendental Meditation gathered for the project.

The researchers, publishing in Social Indicators Research in 1999, reported a maximum 23.3% drop in homicides, rapes and assaults, using a time-series model that accounted for temperature. Robberies showed no significant change¹⁴. A larger 48% figure in the paper was a projection for a permanent group that never existed, not a measured result.

The design has real limits. It covered one city in one summer, with no comparison city assigned by chance, and the results depend on the model’s assumptions. An earlier preliminary report on the project came from an institute at Maharishi University of Management¹⁴.

On the evidence scale, that’s not enough evidence. Meditating together can feel powerful, and many traditions value it for its own sake. But a claim about city crime rates needs stronger proof than this.

How to judge a teacher before you sign up

NCCIH’s advice is to ask about an instructor’s training and experience². That matters because training ranges widely, from a weekend workshop to years of study.

For comparison, Brown’s MBSR teaching certificate involves 398 hours of instruction plus four silent retreats, including one lasting seven days¹⁵. A person can qualify to teach within a year, and the full pathway takes two years or more.

Use these questions before you commit:

1. What training do you have in this specific program, and from whom?
2. How long have you practiced, and do you still work with a mentor or supervisor?
3. What do you do when someone has a hard experience during practice?
4. Do you suggest that some people wait or check with a clinician first, such as people with recent trauma?
5. Will you ever advise me about my medications? The right answer is no; that’s your prescriber’s job.
6. What does it cost, and is there a sliding scale or donation option?

Your first session, and why the practice fits natural-health values

Eight-week courses such as MBSR and MBCT begin with an orientation session³⁸. Classes usually mix guided practice with group discussion and strategies for handling stress². Tell the teacher about any injury, pain or condition that makes sitting or lying still hard, so they can suggest changes.

Expect some homework. In the anxiety trial, MBSR participants were asked to practice 45 minutes a day¹. If that sounds like a lot, ask whether shorter practice is acceptable.

Meditation fits what many natural-health readers already value. It costs little, needs no product, and builds on the body’s own capacity to settle. It also comes from deep spiritual roots, including the Theravada, Zen and Tibetan Buddhist traditions represented in the research above¹³.

A group adds something self-reliance alone can’t: people who notice how you’re doing. The goal is to learn a practice well enough to carry it with you.

Questions readers ask

The bottom line

Group meditation has better evidence than most people realize. Eight-week mindfulness courses ease anxiety and depression about as well as other good treatments, and MBCT helps keep depression from coming back. The group and the teacher appear to be part of why they work.

Meditation is also a real practice with real effects, which means it can stir up hard feelings, especially at high intensity. Pick a trained teacher, start with a structured course or a gentle drop-in group, keep your clinician in the loop, and treat big claims, like lowering a city’s crime rate, with the same care you’d give any other bold promise.

Keep exploring: rituals and anxiety and sense of purpose and longevity.

Related reading

• How to tell psychiatrists, psychologists and therapists apart
• What the letters after a practitioner’s name mean
• What complementary care means, and why the word misleads
• Health coaching is real, unregulated, and easy to get wrong

Sources

1. Hoge EA, Bui E, Mete M, Dutton MA, Baker AW, Simon NM. “Mindfulness-Based Stress Reduction vs Escitalopram for the Treatment of Adults With Anxiety Disorders: A Randomized Clinical Trial.” JAMA Psychiatry, 2022 (print 2023). pubmed.ncbi.nlm.nih.gov
2. National Center for Complementary and Integrative Health. “Meditation and Mindfulness: Effectiveness and Safety.” NIH, updated June 2022. nccih.nih.gov
3. Brown University School of Professional Studies. “MBSR vs. MBCT.” Brown University, November 28, 2023. professional.brown.edu
4. Goyal M, Singh S, Sibinga EMS, et al. “Meditation Programs for Psychological Stress and Well-being: A Systematic Review and Meta-analysis.” JAMA Internal Medicine, 2014. pubmed.ncbi.nlm.nih.gov
5. Kuyken W, Warren FC, Taylor RS, et al. “Efficacy of Mindfulness-Based Cognitive Therapy in Prevention of Depressive Relapse: An Individual Patient Data Meta-analysis From Randomized Trials.” JAMA Psychiatry, 2016. pubmed.ncbi.nlm.nih.gov
6. Canby NK, Eichel K, Lindahl J, Chau S, Cordova J, Britton WB. “The Contribution of Common and Specific Therapeutic Factors to Mindfulness-Based Intervention Outcomes.” Frontiers in Psychology, 2021. frontiersin.org
7. Baumel A, Muench F, Edan S, Kane JM. “Objective User Engagement With Mental Health Apps: Systematic Search and Panel-Based Usage Analysis.” Journal of Medical Internet Research, 2019. pubmed.ncbi.nlm.nih.gov
8. Brown University School of Professional Studies. “Mindfulness-Based Stress Reduction (MBSR).” Brown University, accessed October 2026. professional.brown.edu
9. Insight Meditation Society. “Dana (Generosity).” Insight Meditation Society, accessed October 2026. dharma.org
10. Insight Meditation Society. “Retreat FAQs.” Insight Meditation Society, accessed October 2026. dharma.org
11. Britton WB, Lindahl JR, Cooper DJ, Canby NK, Palitsky R. “Defining and Measuring Meditation-Related Adverse Effects in Mindfulness-Based Programs.” Clinical Psychological Science, 2021. pubmed.ncbi.nlm.nih.gov
12. Schlosser M, Sparby T, Vörös S, Jones R, Marchant NL. “Unpleasant meditation-related experiences in regular meditators: Prevalence, predictors, and conceptual considerations.” PLOS ONE, 2019. journals.plos.org
13. Lindahl JR, Fisher NE, Cooper DJ, Rosen RK, Britton WB. “The Varieties of Contemplative Experience: A Mixed-Methods Study of Meditation-Related Challenges in Western Buddhists.” PLOS ONE, 2017. journals.plos.org
14. Hagelin JS, Rainforth MV, Cavanaugh KLC, et al. “Effects of Group Practice of the Transcendental Meditation Program on Preventing Violent Crime in Washington, D.C.: Results of the National Demonstration Project, June–July 1993.” Social Indicators Research, 1999. link.springer.com
15. Mindfulness Center at Brown University. “For Aspiring MBSR Teachers.” Brown University School of Public Health, accessed October 2026. mindfulness.sph.brown.edu