Why Traditional Sauna Is Better Than Infrared Sauna

When it comes to choosing between traditional and infrared saunas, the scientific evidence points in one direction. Traditional Finnish saunas have decades of robust research behind them. Infrared saunas don't.

The Science Gap

The difference in evidence quality is stark. A landmark study published in BMC Medicine followed 1,688 participants for fifteen years and found that those using traditional saunas four to seven times per week experienced a 70% reduction in cardiovascular disease mortality compared to once-weekly users. A separate Finnish cohort study tracking participants for twenty years found frequent sauna users had a 65-66% lower risk of developing dementia or Alzheimer's disease.

Infrared sauna research, by contrast, involves smaller populations, shorter follow-up periods, and lacks the blinded placebo-control groups needed for strong conclusions. Most studies involve fewer than fifty participants and follow-up periods measured in weeks.

Why Temperature Matters

Traditional Finnish saunas operate at 180 to 200+ degrees Fahrenheit. This heat triggers hormesis, the biological process by which moderate stress strengthens your system. It activates heat shock proteins that repair damaged proteins linked to age-related disease. It drives cardiovascular demands similar to moderate-intensity exercise, with heart rates reaching 120 to 150 BPM and measurable improvements in endothelial function and arterial compliance.

Infrared saunas operate at 120 to 150 degrees, a gap of 60 to 80 degrees. The lower temperature produces a less pronounced hormetic response. Traditional sauna users reach target heart rate zones in around 15 minutes; infrared sauna users typically need 30 to 45 minutes for comparable cardiovascular stress. And despite marketing claims about superior detoxification, sweat composition between the two modalities is nearly identical, roughly 99% water with trace minerals.

The Longevity Gap

Finland has the highest per-capita sauna usage in the world, creating a decades-long natural experiment. The data consistently shows dose-dependent benefits: more frequent traditional sauna use correlates with lower rates of cardiovascular disease, dementia, and all-cause mortality. No comparable population-level data exists for infrared saunas, which isn't a minor limitation. It means we can't make confident claims about infrared's long-term effects on chronic disease or longevity.

The Bottom Line

Infrared saunas can be a reasonable option for heat-sensitive individuals, but they don't match the evidence base for traditional Finnish sauna. At Primal Wellness, we use traditional sauna because we follow the research. Come see what decades of science looks like in practice.

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References

1. BMC Medicine. Sauna bathing is associated with reduced cardiovascular mortality in men and women: prospective cohort study. BMC Medicine, 2018.

2. PubMed. The multifaceted benefits of passive heat therapies with focus on Finnish sauna. PubMed, 2024.

3. Discovery Medical Science Journal. Finnish Sauna Bathing in Cardiovascular Health. Discovery Medical Science Journal, 2024.

4. PMC National Library of Medicine. Far-infrared saunas for cardiovascular risk factors: Summary of evidence. PMC National Library of Medicine, 2009.

5. ScienceDirect. Sauna use as a lifestyle practice to extend healthspan. ScienceDirect, 2021.

6. Healthspan. The Longevity Benefits of Heat: Sauna Therapy Science. Healthspan, 2024.