Transcendental Meditation

Mid-twentieth-century origins in India

Two scholarly sources date the beginnings of the Transcendental Meditation (TM) movement differently. Sawyer and Humes, in a 2023 Cambridge Element, trace its origins in India to 1955, while a 2009 chapter by Humes describes the movement as founded by Maharishi Mahesh Yogi in 1959. The summaries reviewed do not explain the difference, which may reflect different events being counted, so the founding date should be treated as unsettled.

Humes reports that Maharishi adopted the title rishi (seer) rather than guru, said that he had recovered the techniques of his own teacher, and interpreted TM through Advaita Vedanta, presenting the movement as the legitimate heir to an ancient tradition. That is the movement's own positioning as described by a scholar, and it is not evidence that the modern course is unchanged from earlier practice.

Growth in the West and research-based promotion

Sawyer and Humes describe the movement's appeal to 1960s youth culture, a scientific marketing strategy in the 1970s, an inward turn in the 1980s and a later decline in mainstream popularity. Their abstract concludes that the most popular meditation movement in America became an obscure form of Neo-Hinduism. A cardiology statement notes that the relaxation response, pioneered by Herbert Benson in the 1970s, was based in part on TM, and that TM was popularised in the West by Maharishi and taught in the United States by the Maharishi Foundation.

A 2013 meta-analysis on trait anxiety reports that more than 600 TM research papers had been identified. That count comes from the review's own searches of databases devoted to meditation research and says nothing about the quality of those papers.

What the sources reviewed do not cover

The sources reviewed for this draft do not give a dated biography of Maharishi, the details of his teacher's lineage, or how TM developed outside North America. Those points, and the founding-date discrepancy above, should be checked against a full scholarly biography before publication.

The name and its abbreviation

Transcendental Meditation, usually shortened to TM, names a specific taught programme and not meditation in general. A cardiology scientific statement classes it as a mantra-based technique in which each practitioner is given a personal mantra, taught by certified teachers. Researchers who study it often write the Transcendental Meditation technique, and trial reports speak of the TM programme.

Reviews that include TM usually restrict it to the standardised course. A Cochrane review, for example, included only trials in which TM was the sole intervention and excluded multi-component programmes. Findings from TM therefore should not be applied to other mantra, mindfulness or relaxation methods.

Relationship to other meditation labels

A 2014 systematic review sorted meditation programmes into mindfulness-based, mantra-based and other categories, placing TM and other mantra meditation programmes under mantra-based. Its authors note that results did not change when TM was evaluated separately from other mantra training. The Machipedia page on meditation covers the wider family, while this page is limited to the TM course.

Rishi and Vedic vocabulary

Rishi is usually glossed as seer, and Humes reports that Maharishi preferred it to guru as his title. One cardiology table also describes Vedic or transcendental meditation as repeating a word to relax and clear the mind, which shows that lay descriptions of the term vary. Translation of Sanskrit terms in the sources reviewed is given only in passing and should be confirmed with an Indological source.

Instruction and schedule

The American Heart Association statement describes TM as taught by certified teachers in a standard four-day course, with a personal mantra used to help settle the mind inward, and practised for 20 minutes twice daily. Trials reviewed by Hartley and colleagues describe practice of 15 to 20 minutes twice a day. In the 2014 systematic review, TM trials delivered 16 to 39 hours of training over three to twelve months.

The TM organisation's course page describes personal instruction by certified teachers, courses at more than 170 locations across the United States, and links to follow-up support and a course fee. The page reviewed does not state the fee, the mantra selection process or the daily practice time, so those details here come from the research literature.

What the sources do not describe

None of the sources reviewed gives a session-by-session account of what a participant does or experiences, or how a teacher assesses a new student. The sources also do not describe consent procedures, privacy arrangements or a code of conduct for teachers. A reader considering a course can ask a teacher what is involved, what it costs and what follow-up is offered.

Uses that have been studied

Research on TM has concentrated on trait anxiety, psychological stress, blood pressure and wider cardiovascular risk. One meta-analysis examined trait anxiety, and several reviews examined blood pressure in adults with or without hypertension or cardiovascular disease. A cardiology statement also reports two short-term randomised trials of TM whose follow-up found lower mortality, and says these surprising findings need reproduction.

Organisational claims and their limits

The TM organisation's course page states that research shows strong statistical evidence of benefit across a wide set of fields, and in the same passage states that any individual's results cannot be predicted or promised. It also describes its content as general education and not a substitute for medical advice. These are organisational statements, and the independent reviews summarised below are more cautious than that wording.

The sources reviewed do not document why people in everyday life choose TM, and they do not support claims beyond the outcomes named above. Claims for other conditions are not covered here and should not be inferred from the studied outcomes.

Blood pressure

A Cochrane review published in 2014 found four trials with 430 participants. The trials were small, lasted about three months and were at risk of bias; heterogeneity between trials was high (I squared 72 per cent for systolic and 66 per cent for diastolic pressure), so no meta-analysis was done, and the authors drew no conclusion about primary prevention of cardiovascular disease. A later version of this review was withdrawn in 2017, and the reason was not verified.

Pooled analyses report modest reductions. A 2015 meta-analysis of 12 trials (996 participants) found systolic and diastolic differences of about -4.3 and -2.3 mm Hg against controls, while a 2022 meta-analysis of 18 studies (1,207 participants) found about -3.3 and -1.8 mm Hg, with the effect waning after three months. A 2017 overview of eight reviews, rated fair on average for methodological quality, put the effect at about 4 and 2 mm Hg.

A 2019 meta-analysis of nine studies (851 adults with cardiovascular disease or hypertension) found no difference between TM and control groups. Blood pressure fell within the TM groups before and after the intervention, which does not isolate an effect of TM from other influences.

Cardiovascular statement and wider outcomes

The 2017 American Heart Association scientific statement on meditation and cardiovascular risk covered meditation in general. It judged that studies suggest a possible benefit, with modest quality and, in some cases, quantity of data. It recorded that a 2013 statement had concluded TM modestly lowers blood pressure and may be considered, and it found that no conclusions could be drawn on meditation for primary prevention of cardiovascular disease. In the TM trials it described, one found no significant effect on brachial artery reactivity and another found no significant reduction in smoking at three months.

Stress, anxiety and mood

The 2014 systematic review of 47 randomised trials (3,515 participants) with active controls found low or insufficient evidence for any effect of mantra meditation programmes on the stress and well-being outcomes examined, including anxiety and depression. Very few mantra trials met its criteria, three of the TM trials enrolled cardiac patients and one enrolled people with anxiety, and few trials reported harms. The review did not find that meditation programmes outperformed active treatments such as drugs, exercise or other behavioural therapies.

A meta-analysis of 16 studies (1,295 participants) on trait anxiety reported larger reductions for TM than for treatment as usual (d = -0.62) and than for an active alternative (d = -0.50), with larger effects in people with high initial anxiety. The two reviews differ in design and comparators, so their conclusions are not directly interchangeable.

Affiliation and independence of investigators

In a 2004 independent systematic review, Canter and Ernst found five evaluable randomised trials of TM and blood pressure and noted that none was conducted by authors without affiliation to the TM organisation. They concluded the trials had methodological weaknesses, were potentially biased by that affiliation and left the question open. A 2017 overview likewise called for long-term trials by independent researchers, and it classed two of its eight reviews as coming from a TM-related institution.

The American Heart Association statement raises the same issue for meditation research in general, noting possible publication bias and that many investigators may be enthusiastic meditators who hold strong beliefs in its benefit. It asks for future studies by investigators without financial or intellectual bias in outcome. These are critiques of research design and not of individual researchers. The 2013 anxiety meta-analysis tested author affiliation as a moderator, but its abstract does not report the result.

Limits of the pooled findings

Findings are specific to the populations, comparators and follow-up periods studied. Several reviews report small trials, high drop-out, short follow-up, waning effects and differences between within-group and between-group analyses. Review conclusions also differ with search dates and inclusion rules, so a single pooled figure should not be treated as a verdict on the whole programme.

Reports of adverse effects

Trial reporting on harms is sparse. The 2013 anxiety meta-analysis reported no adverse effects across its 16 studies, the Cochrane review found that none of its four trials reported adverse events, and in the 2014 systematic review none of the nine trials that reported harms found any. Not reporting harms is not evidence that none occur.

A 2020 systematic review of 83 studies (6,703 participants) of meditation practices in general found that 55 reported at least one adverse event, with an overall prevalence of 8.3 per cent (95% CI 0.05 to 0.12), lower in experimental studies (3.7 per cent) than in observational studies (33.2 per cent). The commonest events were anxiety, depression and cognitive anomalies, and they could occur in people with no mental health history. The abstract does not separate TM from other practices, so the figures are not TM-specific.

The US National Center for Complementary and Integrative Health says meditation is usually considered to carry few risks but that few studies have examined harms, so definite statements about safety cannot be made. Its page does not mention TM by name.

Suitability and care boundaries

The 2017 cardiology statement, citing low costs and low risks, said meditation may be considered as an adjunct to guideline-directed cardiovascular risk reduction by those interested, while the benefits remain to be better established. A person with high blood pressure, heart disease or a mental health condition should not stop or replace prescribed treatment on the basis of this article, and persistent distress during or after practice is a reason to seek professional assessment.

Training, regulation and costs

The sources describe TM teachers as certified within the TM organisation's own system. They do not describe a statutory regulator or an independent professional register for TM teachers, and none was located for this draft. The organisation's course page refers to a course fee but does not state it, so a reader can ask about costs and follow-up before enrolling.