Yoga Therapy

Yoga before the therapeutic framing

The International Association of Yoga Therapists (IAYT) describes yoga as a system of self-investigation that originated in India, with teachings rooted in the Vedas and grounded in classical texts and an oral tradition. That is the professional body's own account in its training standards and should be read as a statement of tradition, not as a dated historical finding. The sources reviewed supply no dates for earlier periods.

A 2022 review by Ashok and Rama Vaidya notes that the names of yoga have multiplied through teachers and schools, sometimes with the aim of creating a brand and not a renewal of the practice, and it poses the question of whether yoga is a therapy or a lifestyle.

Early laboratory research in India

Paul Dallaghan and Subodh Tiwari, writing in the International Journal of Yoga Therapy in 2025, describe an early twentieth-century shift from what they call folk yoga to a scientific appraisal of hatha yoga techniques. They trace it through the journal Yoga Mimamsa, started in 1924 by Swami Kuvalayananda, who founded the Kaivalyadhama Yoga Institute in the same year. The journal and institute were set up to research yoga techniques scientifically.

According to the same authors, the first published experiment was an X-ray study of the cleansing practice nauli, and later work in the 1930s measured blood pressure, intragastric pressure and alveolar air. Their title speaks of the birth of yoga therapy in 1924, which is their framing of that period. The abstract also mentions a discussion of limitations of this early research, and the full text was not available for this draft.

Krishnamacharya and adapting practice to the person

A 2018 Wellcome Collection article by Lalita Kaplish describes Tirumalai Krishnamacharya (1888 to 1989) as a figure who combined South Asian yogic practices, traditional physical culture and modern exercise systems. It reports his view that yoga should be adapted to the time and place in which it is taught and to the needs of the student, and it mentions Kuvalayananda's yogic physical education for schools.

This is a general-audience museum article, and it was read for this draft only through an automated summary. The sources reviewed do not show how far Krishnamacharya's individual teaching shaped the later yoga therapy profession, so a direct lineage should not be assumed.

Professionalisation through IAYT

IAYT's Scope of Practice says that the association began a self-regulatory initiative in 2007 that produced educational standards, an accreditation process for training programmes, certification of individual yoga therapists and a code of ethics. A 2016 preface to the standards says accreditation was implemented in summer 2013, and a 2017 preface says more than 70 member schools had entered accreditation and twenty-eight had completed it.

These are the association's own accounts. The sources reviewed do not describe earlier development of yoga therapy in Europe, North America or elsewhere outside India, nor when IAYT itself was founded, so those points are left to a later review.

The IAYT definition

IAYT defines yoga therapy as a process of empowering individuals to progress toward improved health and wellbeing through applying the teachings and practices of yoga. Its definition lists goals that include eliminating, reducing or managing symptoms that cause suffering, improving function, helping to prevent the occurrence or recurrence of underlying causes of illness, and changing a person's relationship to their condition. The definition also states that the practice requires specialised training and is informed by Ayurveda and by contemporary health sciences.

The Scope of Practice frames yoga therapy as a professional application of yoga within a therapeutic relationship that includes personalised assessment, goal setting, lifestyle management and yoga practices, for individuals or small groups. The definition also asserts that efficacy is supported by an increasing body of research. That is the association's position, and the evidence sections below set out what reviews report.

Yoga therapy and general yoga teaching

IAYT distinguishes a certified yoga therapist (C-IAYT) from a yoga teacher by additional specialised training. For group work, it says that a hallmark of group yoga therapy, as distinct from group yoga teaching, is an individual intake and assessment for each client before the class, personalisation of practices, and reassessment at intervals during a series of classes.

Research usage is looser. A 2026 scoping review of United States clinical research describes yoga therapy broadly as the intentional adaptation of yoga practices to health-related or therapeutic goals. Of 22 included studies, 6 (27%) defined yoga therapy and 5 (23%) distinguished it from general yoga practice, so a trial of a yoga programme is not automatically a trial of yoga therapy in the IAYT sense.

Sanskrit terms used in training

IAYT's standards use terms from the yoga tradition for the tools of therapeutic application. They gloss asana as postures, pranayama as regulated breathing, bhavana as visualisation, mantra as recitation, and vihara as lifestyle modification including basic yogic dietary concepts, alongside meditation and relaxation techniques, nyasa and mudra. These are IAYT's glosses of tradition-specific terms, and translations vary between lineages.

Assessment, plan and review

IAYT's Scope of Practice says a yoga therapist assesses each client using qualitative or quantitative yoga therapy assessment tools, keeps records, and uses the assessment to identify risk factors or contraindications before developing a therapeutic plan. A footnote says the term therapeutic plan refers to the implementation of yoga therapy and does not imply medical treatment, and that the assessment is not a medical assessment, although it may be informed by a report from a referring healthcare practitioner.

The Scope also describes setting clear goals for each session, giving clear instructions for any home practice with feedback mechanisms, providing follow-up and review at regular intervals, and fostering the client's own support networks and independent practice. Sessions are described as one-to-one or as small groups of clients with a similar condition or with varied health conditions.

Practices, touch and consent

The practices IAYT lists within scope include asana, breathwork, relaxation, meditation, mudra, bandha, mantra, mindfulness, imagery, affirmation or intention, yogic lifestyle and dietary advice, according to the therapist's training. Modifications may be made by verbal instruction or by consented touch, which the Scope says may support a client's body awareness or alignment, with clear consent documented in client records. A person can ask what contact to expect and can ask for it to stop.

Session length, frequency and the number of sessions are not set by the IAYT documents reviewed, and the dose used in trials varies by study. Cochrane reviewers found that most trials in chronic low back pain used Iyengar, Hatha or Viniyoga styles, which are different traditions from one another.

Aims stated by the professional body

IAYT's framework states aims in general terms: managing symptoms that cause suffering, improving function, helping to prevent the occurrence or recurrence of underlying causes of illness, and moving toward improved health and wellbeing. The Scope of Practice does not list specific conditions and says that IAYT-certified therapists commit to not making false or inaccurate claims about yoga's therapeutic and healing capacities.

Conditions that have been studied

Reviews of yoga have examined chronic non-specific low back pain, depressive disorders and chronic spinal pain, and those findings are set out under Research and Evidence. A scoping review of the wider literature identified 178 studies of yoga therapy worldwide for 2016 to 2024, but the United States analysis reviewed here reports on 22 of them and does not list the conditions studied.

The sources reviewed do not document the claims made by individual practitioners, schools or commercial providers. Reasons people seek yoga therapy, and uses promoted outside research, are therefore not covered, and no claim should be inferred from the fact that a condition has been studied.

Chronic non-specific low back pain

A Cochrane review by Wieland and colleagues, with searches to March 2016, included 12 randomised trials with 1,080 participants. Compared with non-exercise controls such as education (9 trials, 810 participants), yoga was associated with small to moderate improvements in back-related function at three to four months (low certainty), six months (moderate certainty) and 12 months (low certainty). Pain was slightly lower on a 0 to 100 scale, but the difference did not reach the reviewers' predefined clinically important threshold of 15 points.

Compared with other exercise (4 trials, 394 participants), the review found very low certainty evidence of little or no difference in function, and it was uncertain whether yoga added to exercise gives more benefit. A 2023 network meta-analysis of 75 trials and a 2022 umbrella review of 72 meta-analyses reported that yoga was superior to some controls for pain or function in chronic low back pain, and both cautioned that the quality and quantity of included studies limit firm recommendations.

Depressive disorders

A 2024 systematic review in Depression and Anxiety by Moosburner and colleagues included 24 randomised trials with 1,395 participants in people with depressive disorders, of which 20 trials were meta-analysed. Yoga showed a short-term reduction in depression severity compared with passive control (standardised mean difference -0.43, 95% confidence interval -0.80 to -0.07) but not compared with active control (-0.22, -0.67 to 0.23). Remission rates were higher with yoga than with passive control (odds ratio 3.20) and active control (2.04), with certainty of evidence ranging from moderate to very low.

The review's authors concluded that yoga could be considered as a possible treatment option, particularly in major depressive disorder. That conclusion rests on trials of varying design and certainty, and the abstract does not identify which trials used individualised assessment. A 2022 umbrella review reported no relevant effects of yoga on depression or quality of life in chronic low back pain populations.

Whether trial findings describe yoga therapy

The 2026 scoping review found variable alignment between United States clinical research and the IAYT definition. Individualised assessment was reported in 12 of 22 studies (55%) and therapeutic goal setting in 5 (23%). Yoga therapists delivered the intervention in 13 studies (59%), and only 4 (18%) reported certification.

The reviews above mostly pooled trials of yoga delivered as a programme, so their results should not be transferred automatically to individualised yoga therapy as IAYT describes it. No trial or review reviewed for this draft compared IAYT-style yoga therapy with a general yoga class for the same condition.

Blinding, comparators and certainty

In the Cochrane review of yoga for low back pain, all trials were at high risk of performance and detection bias because participants and providers could not be blinded and outcomes were self-assessed. The reviewers rated all outcomes no higher than moderate certainty and called for further high-quality research, including longer follow-up.

A 2022 umbrella review found that many of the 72 meta-analyses it covered came from systematic reviews rated critically low in quality on the AMSTAR-2 tool. A review for the World Health Organization of structured exercise for chronic primary low back pain judged evidence for individual exercise types, including yoga, predominantly very low certainty.

A self-regulated field and a contested label

IAYT's educational standards, scope of practice and efficacy statements are produced by the professional body that credentials yoga therapists. This does not make them inaccurate, but the sources are not independent of the profession. The Vaidya review also raises the concern that the naming of yoga styles is sometimes driven by branding, which applies to how any new label, including a therapy label, is read.

What the searches did not find

A PubMed search on 5 October 2026 for yoga therapy, the IAYT and definitions returned one record, the 2026 scoping review. Searches for systematic reviews of yoga in low back pain, depression and adverse events returned the reviews cited here. Other databases were not searched, and no review specific to IAYT-defined yoga therapy was found.

Adverse events in trials

In the Cochrane review, moderate certainty evidence from six trials showed a higher risk of adverse events, primarily increased back pain, with yoga than with non-exercise controls (risk difference 5%, 95% confidence interval 2% to 8%). Low certainty evidence suggested no difference in risk compared with other exercise, and the reviewers reported no association with serious adverse events.

A review for the World Health Organization found temporary increased minor pain associated with yoga compared with usual care, and the 2024 depression review found no difference in safety outcomes with wide confidence intervals. The depression review's confidence interval for passive control (odds ratio 1.00, 0.10 to 9.98) shows that rare events cannot be excluded.

Case reports of harm

A 2013 systematic review of published case reports found 76 cases of adverse events associated with yoga. Of these, 35.5% affected the musculoskeletal system, 18.4% the nervous system and 11.8% the eyes, and headstand, shoulder stand, lotus position and forceful breathing were the most cited postures and techniques. A 2026 review of case reports found 84 events in 70 studies, including musculoskeletal (40%) and eye-related (19%) events, with headstand in 18% and forceful pranayama in 10%, and 54% of people had pre-existing vulnerabilities.

Case reports cannot give the frequency of harm. They concern yoga in general and were not specific to yoga therapy. The 2026 authors describe adverse events as uncommon but potentially serious in people with underlying risk factors, and they call for pre-practice screening and trained instructors.

Training, scope and care boundaries

IAYT's educational standards set minimum requirements for accredited training programmes: a 200-hour yoga teacher training or its equivalent, one year of teaching experience and one year of personal practice for entry, then at least 800 hours over a minimum of two years, with at least 205 practicum hours, of which 150 are delivered yoga therapy sessions. IAYT states that it is not a licensing body. The sources reviewed do not describe requirements that differ by country, so they should be checked locally.

IAYT's Scope of Practice says a yoga therapist is not qualified, unless separately qualified, to diagnose a medical or psychological condition, prescribe medication, advise a client to stop medication prescribed by another practitioner, or undertake psychological counselling. It requires referral when a client's concerns fall outside the scope. Yoga therapy is educational and is not a substitute for medical assessment, and it should not delay or replace necessary care.