HealthTech Commentary: THE FAR INFRARED SAUNA

More Than Just Heat: Understanding the Evolution of Sauna Technologies

By Lennard M. Goetze, Ed.D.

2/5/2026  - Two years ago, while attending the Integrative Healthcare Symposium (NYC), Dr Robert Bard and I spent several days exploring the exhibit floor reviewing emerging technologies, wellness solutions, nutritional products, and various integrative health modalities. As reviewers and publishers for HealthTech Reporter, events such as these provide valuable opportunities to evaluate innovations that may eventually influence patient care, self-care practices, and the evolving landscape of preventive health. Among the many technologies presented at the conference, one product in particular captured my attention—not because of its complexity, but because of its simplicity. The company was Relax Sauna, and its portable far-infrared sauna system represented a distinctly different approach to heat-based wellness therapy than the conventional sauna experiences most consumers recognize.

At the time, our interest was primarily professional. Like many healthcare technologies encountered at industry events, we cataloged the information, conducted preliminary discussions with representatives, and continued exploring other exhibits. However, the concept remained in the back of our minds and came to light again when we launched DetoxScan.org - an educational website about the many detox modalities and solutions. More recently, my personal interest in sauna therapy transitioned from professional curiosity to personal experience when I purchased a steam sauna for home use.

My decision was influenced by growing public and professional interest in heat therapy as a component of wellness and recovery. Sauna use has been associated with a variety of physiological responses, including improved circulation, muscle relaxation, stress reduction, and enhanced recovery following physical activity. The expanding body of literature examining cardiovascular health, metabolic function, and overall well-being has contributed to increased consumer interest in sauna technologies. Like many individuals exploring health optimization strategies, I was interested in determining whether sauna therapy could become a practical component of my own wellness routine.

While the experience was generally positive, it also highlighted an important consideration often overlooked by consumers: not all sauna technologies produce the same physiological experience. As an individual with asthma, I found that prolonged exposure to a highly humid environment occasionally created breathing discomfort. Although I appreciated many aspects of steam therapy, the experience reinforced the reality that personal tolerance, comfort, and underlying health considerations can significantly influence the suitability of any therapeutic modality.

This experience led me to revisit the broader question of sauna technology and, more specifically, the distinctions between traditional saunas, steam rooms, infrared systems, and far-infrared approaches. In discussing these differences with colleague Daniel Root—known by many in wellness circles as "Professor Sauna"—it became evident that much of the public conversation surrounding saunas tends to oversimplify a category that is, in reality, quite diverse.

Traditional Finnish saunas remain the most widely recognized sauna format. These systems utilize heated rocks and elevated ambient temperatures, often ranging from 150 to 195 degrees Fahrenheit. The primary mechanism involves heating the surrounding air, which subsequently warms the body. This approach has centuries of historical use and has been the subject of numerous studies examining cardiovascular health, circulation, stress reduction, and longevity. The experience is characterized by intense dry heat, although humidity may be temporarily increased by pouring water over heated stones. For many sauna enthusiasts, the traditional Finnish sauna remains the benchmark against which other sauna technologies are evaluated.

Steam rooms, sometimes referred to as wet saunas, utilize an entirely different approach. Instead of generating intense dry heat, steam systems produce a lower-temperature environment accompanied by nearly 100 percent humidity. Temperatures generally range between 110 and 120 degrees Fahrenheit, creating an atmosphere that many individuals find soothing for respiratory comfort and skin hydration. The moisture-rich environment distinguishes steam therapy from traditional saunas and may influence user preference depending upon individual health considerations and comfort levels.

Infrared technology represents a more recent evolution in sauna design. Rather than heating the air, infrared systems use radiant energy to warm body tissues directly. As a result, ambient temperatures can remain substantially lower while still producing significant sweating and thermal effects. Many infrared systems operate between 120 and 140 degrees Fahrenheit, making them attractive to individuals who find traditional sauna temperatures difficult to tolerate. Advocates frequently cite benefits related to muscle recovery, relaxation, pain management, and convenience, although individual experiences may vary.

Within the infrared category, far-infrared technology occupies a specialized niche. This is the area in which Relax Sauna established its identity. Unlike large, permanent installations, the Relax Sauna was designed as a portable personal system that could be assembled, disassembled, and transported with relative ease. The technology utilizes ceramic semiconductor radiators engineered to emit far-infrared wavelengths intended to be readily absorbed by human tissue. The objective is to deliver therapeutic heat directly to the body while maintaining a more comfortable surrounding environment. According to product information, the system also emphasizes rapid heating, low electromagnetic field exposure, and practical home accessibility.

From a technology assessment perspective, what impressed me most about the Relax Sauna concept was not necessarily the thermal engineering itself, but rather its focus on usability. Throughout my years evaluating healthcare technologies, I have repeatedly observed that successful adoption often depends as much upon convenience and accessibility as it does upon scientific sophistication. A technology that requires extensive installation, dedicated space, or complex maintenance may present barriers that reduce long-term utilization. Conversely, solutions designed around practicality often achieve greater consistency of use, which may ultimately determine their real-world effectiveness.

My exploration of sauna technologies has reinforced a broader lesson that extends beyond heat therapy itself. Consumers frequently evaluate wellness interventions as though they represent a single category, when in fact substantial differences may exist between individual modalities. The term "sauna" encompasses multiple technologies, distinct mechanisms of action, varying thermal environments, and different user experiences. Understanding these distinctions allows individuals to make more informed decisions based upon personal health needs, comfort preferences, and therapeutic objectives.

Today, I remain enthusiastic about the broader concept of sauna therapy while also recognizing that no single approach is universally appropriate for every individual. Traditional saunas, steam rooms, infrared systems, and far-infrared technologies each offer unique characteristics that may appeal to different users. My own experience with steam therapy demonstrated both the potential benefits and the practical limitations associated with individual health circumstances. At the same time, revisiting technologies such as Relax Sauna has expanded my appreciation for the innovation occurring within this category.

As healthcare continues to move toward greater personalization, consumers increasingly seek wellness solutions that align with their individual needs rather than conforming to a one-size-fits-all model. Sauna technologies represent an excellent example of this trend. What began for me as a brief encounter with an unusual product on a convention floor has evolved into a deeper understanding of how diverse heat-based wellness therapies have become. More importantly, it has reinforced the importance of evaluating technologies not only for their intended benefits, but also for their practicality, accessibility, and suitability for the individuals who choose to use them.

 

 PART 2:

Heat Therapy, Sauna Medicine, and the Future of Restorative Care

By Robert L. Bard, MD & Leslie Valle-Montoya

Throughout the history of medicine, heat has served as one of humanity's oldest therapeutic tools. Long before advanced pharmaceuticals, surgical interventions, and modern imaging technologies, physicians and healers recognized the body's response to controlled thermal exposure. Today, as interest grows in wellness technologies and preventive medicine, sauna therapy represents a modern extension of this longstanding therapeutic principle.

While many consumers associate saunas primarily with relaxation, emerging research suggests that heat therapy may possess broader physiological benefits worthy of greater attention within the medical community. Studies have demonstrated that controlled heat exposure can influence circulation, vascular function, autonomic nervous system regulation, and cardiovascular performance. Repeated sauna use has been associated with improvements in endothelial function, reductions in arterial stiffness, and enhanced blood flow, all of which are central to long-term cardiovascular health. Multiple investigations have further reported associations between regular sauna use and reduced cardiovascular mortality, suggesting that passive heat therapy may provide meaningful physiologic benefits beyond simple comfort or stress reduction.

From a clinical perspective, one of the most compelling aspects of heat therapy is its ability to stimulate circulatory activity without requiring strenuous physical exertion. The cardiovascular response observed during sauna exposure often parallels many of the physiologic adaptations associated with moderate exercise, including increased heart rate, vasodilation, and enhanced peripheral circulation. This characteristic may be particularly relevant for patients whose mobility, conditioning, or treatment-related limitations restrict conventional exercise participation.

The modern sauna marketplace now offers a diverse range of technologies, including traditional Finnish dry saunas, steam systems, infrared units, and far-infrared platforms. Each modality delivers heat through different mechanisms and creates distinct physiologic environments. As physicians, it is important to recognize that no single technology is universally superior; rather, patient-specific factors such as cardiovascular status, pulmonary health, mobility limitations, treatment history, and comfort tolerance should guide selection.

Within the field of restorative medicine, the role of heat therapy deserves increased investigation. Through our work with RehabScan.org, we continue to explore noninvasive strategies that support recovery, circulation, mobility, tissue healing, and quality of life following major medical treatments. Cancer survivors, in particular, frequently experience fatigue, deconditioning, circulatory compromise, musculoskeletal discomfort, and treatment-related functional limitations. Although sauna therapy should never be viewed as a replacement for evidence-based medical care, it may serve as a valuable complementary modality within a broader rehabilitation framework designed to restore function and improve patient resilience.

The future of healthcare will increasingly emphasize recovery, restoration, and prevention alongside diagnosis and treatment. Heat therapy occupies an interesting position within this evolution. What was once regarded primarily as a wellness practice is now generating scientific interest as a potentially meaningful adjunct within cardiovascular care, rehabilitation medicine, integrative health, and survivorship programs. Continued clinical investigation will determine its ultimate role, but the growing body of evidence suggests that heat may once again become an important therapeutic tool in modern medicine.