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Cardiovascular & vascular function
This is among the most studied areas. Reviews discuss blood pressure, endothelial function, arterial stiffness and cardiovascular outcomes.
Review ↗🧠
Cognition
Finnish cohort research reports an inverse association between sauna frequency and dementia/Alzheimer's incidence in men. It is not proof of prevention.
Cohort ↗🫁
Respiratory health
Systematic reviews include pulmonary and respiratory findings, but the evidence base is smaller and more heterogeneous than for cardiovascular outcomes.
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Pain & rheumatic conditions
Small studies have explored chronic pain, fibromyalgia and rheumatic conditions. These findings are interesting, but larger controlled trials are needed.
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Exercise & recovery
Heat exposure has been studied in athletes and exercise contexts. Protocol, timing and hydration matter, and findings should not be generalized beyond the studied conditions.
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Relaxation & well-being
Relaxation is a longstanding reason people use saunas. Subjective well-being can be meaningful while still being different from a demonstrated disease-treatment effect.