Infrared vs. Traditional Saunas: A Comparative Guide

Introduction

Saunas have long been associated with relaxation, cardiovascular health, and physical recovery. Today, two major types dominate the landscape: traditional saunas, which use heated air or steam, and infrared saunas, which use light to penetrate tissues and warm the body from within. While both offer health benefits, there are several key differences in how they operate and how users experience them.

How They Work

Traditional Saunas:

Use electric, gas, or wood-burning heaters

Heat the surrounding air to 175–212 °F (80–100 °C)

Warm the body through convection and radiant heat

Infrared Saunas:

Use far-infrared (FIR) light to heat the body directly

Operate at 113–140 °F (45–60 °C )

Deliver deeper tissue penetration with lower ambient heat

Feature

Traditional Sauna

Infrared Sauna

Heat Type

Heated air (dry or steam)

Far-infrared light

Temp Range

175–212 °F (80–100 °C)

113–140 °F (45–60 °C)

Tissue Penetration

Surface heat

Deep tissue penetration

Warm-Up Time

30–45 min

10–15 min

Comfort

Intense, high heat

Gentler, low heat

Energy Use

Higher

Lower

Tolerance

May be hard for some users

Well tolerated by heat-sensitive clients

Comparing Benefits: Infrared Sauna vs. Traditional Sauna

Shared Benefits:

Improves circulation and vascular function (e.g., elevated heart rate and vasodilation similar to moderate exercise)

Supports stress reduction via parasympathetic activation

Enhances muscle recovery and joint pain relief

Evidence shows both sauna types induce comparable cardiovascular responses: increased VO₂, reduced arterial stiffness, and lowered blood pressure

Mechanisms include heat-induced protein expression, nitric oxide production, and improved autonomic balance

Infrared Sauna Benefits:

Endothelial function improved: Imamura et al. (2001, JACC) conducted a randomized trial where patients with coronary risk factors used 60 °C FIR saunas for 15 minutes daily over 2 weeks. Results showed a significant increase in flow-mediated dilation (FMD), a measure of vascular health

Imamura et al., JACC, 2001 PubMed

Cardiovascular and lipid benefits post-exercise: A 2022 RCT (47 adults with cardiovascular risk factors) compared exercise alone vs. exercise followed by a traditional sauna (EXS). While not infrared, similar cardiovascular stress underlies both modalities. The EXS group saw +2.7 mL/kg/min VO₂max, –8 mmHg systolic BP, and improved cholesterol compared to exercise alone

Earric Lee et. al., Am J Physiol Regul Integr Comp Physiol. 2022 PubMed

Athletic Recovery: FIR improved soreness and neuromuscular performance 14 hours post-exercise without negatively impacting sleep or autonomic recovery. Subjects reported less muscle soreness and better subjective recovery.

Ahokas et al., Biol Sport, 2023 PubMed

Fibromyalgia + Chronic Fatigue Syndrome: 44 women with fibromyalgia underwent 12 weeks of combined FIR sauna (3/week) and underwater exercise (2/week). Results showed 31–77% reductions in pain and symptom scores, maintained at 6-month follow‑up.

Matsumoto et al., Complementary Therapies in Clinical Practice, 2010 JACC

Heart Failure Markers: In a clinical trial with 20 NYHA II–III CHF patients, daily 60 °C (140 °F) FIR sauna for 15 min over 2 weeks significantly improved endothelial function and reduced plasma BNP — with 17/20 patients reporting symptom relief.

Kihara et al., JACC, 2002 PubMed

Traditional Sauna Benefits:

Longevity & Mortality: A 20-year Finnish study of 2,300+ men showed a 63% lower risk of sudden cardiac death and 61% lower stroke risk with frequent sauna use

Laukkanen et al., JAMA Intern Med, 2015 PubMed

Heart failure symptom improvement: Daily 60 °C dry saunas for 15 minutes over 2 weeks in CHF patients improved endothelial function and decreased BNP—a marker of cardiac stress.

Kihara et al. (2002, JACC) Pub Med

Blood Pressure & Vascular Function: An 8-week randomized trial combining exercise with 15-minute post-session dry sauna use showed a reduction in systolic BP by 8 mmHg and improved arterial stiffness compared to exercise alone

Haapala et al., Am J Physiol Regul Integr Comp Physiol, 2022 PubMed

Cardiovascular Mortality Reduction: Sauna use ≥4 times per week was associated with a significantly lower risk of fatal cardiovascular disease compared to once-weekly users

Laukkanen et al., BMC Med, 2018 PubMed

High-grade peer-reviewed trials support robust cardiovascular and recovery benefits for traditional saunas, with complementary evidence emerging for infrared use. Both modalities trigger common physiological responses — heat stress, increased circulation, and vascular adaptation — making their benefits broadly transferable. As infrared sauna research grows, it continues to close the evidence gap with traditional methods.

Benefits for Clients

While both sauna types provide health benefits, the client experience differs in terms of heat intensity, comfort, and personal preference.

Infrared Sauna:

Lower ambient heat = more comfort

Accessible for seniors and those with heat intolerance

Shorter sessions allow easier scheduling

Traditional Sauna:

Intense heat offers a familiar, cathartic experience

Perceived as more effective for detox through sweat

Strong cultural resonance for some users

Benefits for Clinics

For many businesses, infrared saunas offer operational advantages: less space, faster turnover, and broader appeal.

Consideration

Infrared Sauna

Traditional Sauna

Space Needed

Compact, vertical cabin

Larger room required

Energy Efficiency

High

Moderate to low

Client Throughput

Faster warm-up = more sessions

Slower turnover

Accessibility

Ideal for diverse client needs

May require more screening

Setup & Maintenance

Plug-and-play options available

Requires ventilation & heat control

Conclusion

Traditional and infrared saunas each offer compelling, science-backed health benefits. Traditional saunas are supported by decades of research showing reductions in cardiovascular mortality, improved fitness, and strong thermoregulatory effects. Infrared saunas, while newer, have demonstrated comparable outcomes in key areas such as blood pressure regulation, vascular function, and muscle recovery—often with greater user comfort and lower operational demands.

Ultimately, both modalities induce similar physiological responses, including increased circulation, heat stress adaptation, and autonomic nervous system activation. For clinics and clients alike, the best choice depends on therapeutic goals, heat tolerance, space requirements, and individual health status.

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