Does the Combination of Finnish Sauna Bathing and Other Lifestyle Factors Confer Additional Health Benefits? A Review of the Evidence
Technology context Traditional Finnish sauna research, combined with other lifestyle factors
Finding: Argues that frequent sauna bathing may augment the benefits of other protective factors such as physical activity and cardiorespiratory fitness, or offset the adverse effects of risk factors such as high blood pressure and systemic inflammation.
Main limitation: Narrative review of predominantly observational evidence; combined-exposure analyses are especially vulnerable to residual confounding.
Executive summary
This 2023 review asks a question that matters more to a buyer than most sauna research: does a sauna add anything on top of the things already known to work?
The authors summarise epidemiological and interventional evidence on the combined effects of Finnish sauna bathing and other risk or protective factors, across vascular outcomes including cardiovascular disease, intermediate cardiovascular phenotypes, non-vascular outcomes, and mortality.
Their central proposition is that frequent sauna bathing is an emerging protective risk factor that may augment the beneficial effects of other protective factors such as physical activity and cardiorespiratory fitness, or attenuate or offset the adverse effects of risk factors such as high blood pressure, systemic inflammation and low socioeconomic status.
They attribute this to blood pressure-reducing, anti-inflammatory, antioxidant, cytoprotective and stress-reducing properties, and to synergistic effects on neuroendocrine, circulatory, cardiovascular and immune function.
The framing is the useful part. Throughout this literature, sauna bathing is presented as an addition to exercise rather than a replacement for it - which is the correct way for a buyer to think about the purchase.
Why this research matters
People considering a significant wellness purchase are implicitly asking whether it adds anything beyond what they already do. This review addresses that question directly, which is unusual.
Its answer - that sauna bathing appears to augment rather than substitute - is also the most commercially honest framing available. No sauna replaces physical activity, and this literature does not claim it does.
Study design
- Study type
- Narrative review
- Evidence base
- Epidemiological and interventional studies
- Exposure
- Finnish sauna bathing, examined in combination with other risk and protective factors
- Co-exposures examined
- Physical activity, cardiorespiratory fitness, high blood pressure, systemic inflammation, socioeconomic status
- Outcomes
- Cardiovascular disease, intermediate cardiovascular phenotypes, non-vascular outcomes, mortality
- Number of studies included
- Not reported in the source abstract
- Total participants
- Not reported in the source abstract
- Risk-of-bias assessment
- Not reported in the source abstract
- Meta-analysis
- Not performed
What the researchers found
The review reports that several observational and interventional studies suggest regular or frequent sauna bathing reduces the incidence of vascular and non-vascular diseases including hypertension, cardiovascular disease, dementia and respiratory conditions; may improve the severity of conditions such as musculoskeletal disorders, COVID-19, headache and influenza; and increases lifespan.
Its distinctive contribution is the joint-exposure argument: evidence suggests frequent sauna bathing may augment the beneficial effects of other protective factors such as physical activity and cardiorespiratory fitness, or attenuate or offset the adverse effects of risk factors such as high blood pressure, systemic inflammation and low socioeconomic status.
Proposed mechanisms are blood pressure-reducing, anti-inflammatory, antioxidant, cytoprotective and stress-reducing properties, with synergistic effects on neuroendocrine, circulatory, cardiovascular and immune function.
No pooled effect estimates are generated by this review and none are reproduced here.
What the results mean
The joint-exposure framing is genuinely useful and appropriately modest. Sauna bathing is presented as something that may add to a healthy pattern, not as an intervention that stands alone.
The word 'increases lifespan' appears in the review's own summary, and it is worth flagging: that is stronger language than the underlying observational designs support, and IMPERVITA does not repeat it as a claim.
Combined-exposure analyses carry an amplified version of the confounding problem. Someone who saunas frequently and is physically fit differs from someone who does neither in income, leisure time, health literacy and much else. Statistical adjustment cannot fully separate these.
What this study does not prove
- It does not establish that sauna bathing causes any of the outcomes discussed, or that it increases lifespan.
- It does not establish a synergistic interaction in any statistical sense; the argument is drawn from observational patterns.
- It does not apply to infrared saunas.
- It does not support substituting sauna use for physical activity - the review's own framing is additive.
- It provides no pooled effect estimates or formal quality grading.
- It does not resolve confounding, which is heightened rather than reduced in joint-exposure analyses.
Evidence strength
Narrative review
A narrative review examining joint exposures - what happens when sauna bathing is combined with other lifestyle factors.
Joint-exposure analyses are analytically demanding and particularly susceptible to confounding, because people who do two healthy things tend to differ from people who do neither in many other ways as well. That vulnerability is inherent to the question, not a flaw in the execution.
Strengths and limitations
Strengths
- Addresses a practically important question that most of the literature ignores.
- Frames sauna bathing as additive to rather than substitutive for established interventions.
- Covers vascular, non-vascular and mortality outcomes together.
- Published in a well-regarded peer-reviewed clinical journal.
- Discusses gaps in the evidence base and future directions explicitly.
- The most recent broad review of this field.
Limitations
- Narrative design without formal bias assessment.
- Predominantly observational underlying evidence.
- Joint-exposure analyses are especially vulnerable to residual confounding.
- Substantial author overlap with the primary evidence being reviewed.
- Some summary language, including references to increased lifespan, is stronger than the designs support.
- Study counts and participant numbers not reported in the source abstract.
Does this apply to the equipment IMPERVITA sells?
The subject is Finnish sauna bathing. These findings should not be applied to infrared sauna systems without direct supporting evidence.
The additive framing does transfer as a way of thinking, however. Whatever technology you buy, the research across this whole library consistently positions recovery equipment as an addition to sleep, physical activity and general health rather than a shortcut around them.
That is worth stating to anyone weighing a five-figure recovery room against, for example, a gym membership and better sleep habits.
Evidence in context
This review extends the argument made in the same group's 2018 review rather than testing it with new designs. The underlying evidence remains the Finnish cohorts and a scattering of small intervention studies.
The independent 2018 systematic review of 40 dry sauna studies remains the better guide to evidence quality, and its conclusions - small studies, few randomised trials, undetermined optimal dosing - have not been superseded.
Evidence quality on the joint-exposure question specifically has not improved; no randomised trial has tested sauna bathing as an addition to an exercise programme with hard clinical endpoints.
Related research
- Cardiovascular and other health benefits of sauna bathing: a review of the evidence The earlier review from the same group that this one extends.
- Clinical effects of regular dry sauna bathing: a systematic review Independent systematic review with formal bias assessment.
- Association between sauna bathing and fatal cardiovascular and all-cause mortality events The primary mortality cohort underlying much of this argument.
- Far-infrared saunas for treatment of cardiovascular risk factors: summary of published evidence The infrared-specific evidence base, for comparison.
Practical buyer relevance
The most useful thing in this review for a buyer is what it does not claim. Sauna bathing is positioned as an addition to physical activity and fitness, not a substitute.
If you are weighing a recovery purchase against other uses of the same money, that framing is worth taking seriously. Equipment that gets used alongside consistent training and decent sleep is the scenario this literature describes. Equipment bought instead of those things is not.
For specification, this changes nothing directly. It reinforces the same practical conclusion the rest of the sauna literature points to: frequency is the variable that matters, so buy the cabin you will use often.
Safety context
Heat exposure is not appropriate for everyone. People with cardiovascular disease, unstable angina, recent myocardial infarction, low blood pressure, or conditions affecting heat tolerance, and people who are pregnant or taking medication that affects thermoregulation, may require guidance from a qualified healthcare professional before using a sauna.
Alcohol should not be combined with sauna use. A systematic review of dry sauna bathing identified one small study reporting reversible disruption of male spermatogenesis, which is worth raising with a clinician if you are trying to conceive.
Full source record
- Title
- Does the Combination of Finnish Sauna Bathing and Other Lifestyle Factors Confer Additional Health Benefits? A Review of the Evidence
- Authors
- Kunutsor SK, Laukkanen JA
- Organization
- University of Leicester / University of Eastern Finland
- Publication
- Mayo Clinic Proceedings
- Year
- 2023
- Volume / issue / pages
- Volume 98, issue 6, pages 915-926
- PMID
- 37270272
- Study type
- Narrative review of epidemiological and interventional evidence
- Sample size
- Not reported in the source abstract
- Population
- Varied across the studies reviewed
- Topic
- Longevity, Performance, Sauna
- Document type
- Narrative review
- Technology context
- Traditional Finnish sauna research, combined with other lifestyle factors
- Related equipment context
- Infrared Saunas
- Source last verified
- 19 August 2026
References
- Does the combination of Finnish sauna bathing and other lifestyle factors confer additional health benefits? A review of the evidence
- Cardiovascular and other health benefits of sauna bathing: a review of the evidence
- Clinical effects of regular dry sauna bathing: a systematic review
- Association between sauna bathing and fatal cardiovascular and all-cause mortality events
- Far-infrared saunas for treatment of cardiovascular risk factors: summary of published evidence
Information provided by IMPERVITA is for educational and general wellness purposes and is not intended to replace professional medical advice, diagnosis, or treatment.
