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Meditation Beneath the Surface: A Narrative Review of Underwater Mindfulness, Breath-Hold Physiology and Contemplative Tradition

Satinder Singh Rekhi, Saamdu Chetri, Luis Miguel Gallardo, Renitta Sinha

Journal of Happytalism and Fundamental Peace October 14, 2026 DOI: 10.68220/whf.2026.003 (opens in new tab)

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AI-extracted from the abstract
Characteristics Narrative review Randomized Peer reviewed
Topics Meditation
Key findings Argues that underwater settings plausibly amplify mindfulness anchors such as breath, body and present-moment sensation, and proposes an "optimal environment hypothesis": in still, warm, clear, shallow water with technical demands minimised, underwater practice may deepen mindfulness beyond equivalent land practice. The authors note no study has compared underwater with land-based meditation and that hypoxic blackout is a serious, sometimes fatal risk.

Abstract

**Background.** Contemplative traditions have long associated water with stillness, concealment and renewal, and divers frequently describe underwater experience as meditative. This review asks whether immersion and submersion offer a distinctive context for mindfulness practice, and what the current evidence can and cannot support. **Methods.** A narrative review integrating epic and canonical Indian sources, the physiology of immersion and breath-hold diving, controlled and uncontrolled studies of diving-based mindfulness programmes, neuroimaging of elite freedivers, and adjacent research on flotation-REST, blue space and aquatic therapy. **Findings.** Water immersion reliably shifts autonomic balance towards parasympathetic activity, and facial submersion recruits the trigeminally mediated diving response. Scuba diving imposes slow, deliberate breathing and has been associated with reduced perceived stress and increased self-reported mindfulness in a small controlled trial (n = 67). A randomised pilot of mindfulness-integrated diving in people with PTSD (n = 34) found a significant advantage over multisport activity only for intrusion symptoms at one month, with effects gone by three months. A single-case EEG/fMRI study of a world-champion freediver found alpha-band and default-mode changes that partly overlap with meditation signatures. Flotation-REST, which removes most exteroceptive input, produces large acute reductions in state anxiety and heightens interoceptive awareness. **Conclusions.** Underwater settings plausibly amplify the attentional anchors central to mindfulness: breath, body and present-moment sensation. However, no study has compared underwater meditation with equivalent land-based practice, and hypoxic blackout poses a serious, sometimes fatal risk. We propose an optimal environment hypothesis: in still, warm, clear and shallow water, with technical demands minimised, underwater practice may deepen mindfulness beyond equivalent practice on land. It should be tested in rigorous, safety-first trials.

Comparable studies

Other narrative reviews on meditation, most cited first.

Study Year Design Participants
Mindfulness training as a clinical intervention: A conceptual and empirical review. Clinical populations 2003 Review
Mindfulness: Theoretical Foundations and Evidence for its Salutary Effects 2007 Review
Mindfulness Interventions 2016 Review
Mind the Hype: A Critical Evaluation and Prescriptive Agenda for Research on Mindfulness and Meditation 2017 Review
Mindfulness and acceptance: expanding the cognitive-behavioral tradition 2005 Review

Citations in the library

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