From Sutra to Science: Reinterpreting Yogic Traditions through a Modern Lens

Abstract

Background: Yoga has travelled from aphoristic Sanskrit scholasticism and tantric body-technologies to a globally consumed health practice, accompanied by a rapid expansion of scientific studies. The translation of yogic constructs into biomedical variables is often presented as seamless validation, yet its epistemic costs are seldom audited.

Objective: To reinterpret the core constructs of yogic traditions (mental restraint, posture, breath regulation, meditation and subtle-body anatomy) through the scientific evidence available up to 2024, and to expose where that evidence is strong, weak or conceptually mismatched.

Methods: A critical narrative synthesis, structured with PRISMA 2020 and PRISMA-ScR reporting principles, drew on 100 scholarly sources organised into six evidence domains. Headline quantitative results were extracted from published reviews and trials, cross-checked against their abstracts and compared without pooling across incompatible metrics.

Results: Randomised evidence supports modest, mostly short-term benefits for depressive symptoms (standardised mean difference −0.69 against usual care across 12 trials), cardiometabolic risk markers (systolic blood pressure −5.21 mmHg) and chronic low back pain (small effects, low-to-moderate certainty). Yoga typically outperforms inactive comparators but matches active ones such as exercise. Mechanistic narratives involving GABA, vagal tone, inflammation and telomeres rest largely on small, cross-sectional, uncontrolled or multicomponent studies. Subtle-body constructs have no validated anatomical correlate, and adverse events, though comparable to those of other exercise, are concentrated in specific practices and vulnerable groups. Population use in the United States rose from 9.5% to 14.3% between 2012 and 2017.

Conclusions: Science can legitimately reinterpret yoga as a family of attentional, respiratory and postural skills with measurable, modest health effects, but it cannot validate the soteriological claims of the sutras or the anatomical claims of the subtle body. A credible research agenda requires specified interventions, active and sham comparators, long-term follow-up, safety reporting and an explicit recognition of yoga as an ethically framed, culturally transmitted practice.