How Infrared Sauna Therapy May Support Relaxation, Recovery, and Stress Management

In today's fast-paced world, stress has become so common that many people view it as a normal part of life. Busy work schedules, family commitments, financial pressures, constant digital connectivity, and a never-ending stream of information can leave people feeling mentally and physically exhausted.

While short periods of stress are a normal and necessary part of human physiology, chronic stress is a different story. When stress becomes persistent, it can affect nearly every system in the body, contributing to fatigue, muscle tension, poor sleep, digestive issues, chronic pain, anxiety, reduced recovery, and an increased risk of chronic disease.

For this reason, healthcare professionals are increasingly interested in interventions that support recovery, relaxation, and overall wellbeing rather than simply addressing symptoms after they arise.

One intervention attracting growing attention is infrared sauna therapy.

While many people initially use an infrared sauna to relax or recover from exercise, researchers are beginning to understand that its effects may extend beyond muscles and circulation. Emerging evidence suggests that sauna bathing may influence physiological processes associated with relaxation and recovery. While researchers continue to investigate the underlying mechanisms, regular sauna use has been associated with improvements in wellbeing, perceived stress, recovery, and quality of life (Hussain & Cohen, 2018; Laukkanen et al., 2018).

Understanding the Nervous System

To understand why sauna therapy may help with stress management, it is useful to understand how the nervous system responds to everyday life.

The autonomic nervous system has two primary branches:

The Sympathetic Nervous System

Often referred to as the "fight or flight" system, the sympathetic nervous system prepares the body to respond to challenges or threats.

When activated, it can cause:

• Increased heart rate

• Increased blood pressure

• Heightened alertness

• Muscle tension

• Increased stress hormone release

• Reduced digestive activity

This response is useful during genuine emergencies. However, many people experience sympathetic activation for prolonged periods due to modern lifestyle pressures.

The Parasympathetic Nervous System

Often called the "rest and digest" system, the parasympathetic nervous system supports recovery and restoration.

When activated, it promotes:

• Relaxation

• Improved digestion

• Lower heart rate

• Reduced muscle tension

• Recovery processes

• Better sleep

Optimal health depends on the body's ability to move flexibly between these systems as circumstances require.

The Modern Stress Challenge

Unlike our ancestors, who generally experienced short bursts of stress followed by recovery, many people today experience low-grade stress almost continuously.

Examples include:

• Work deadlines

• Financial concerns

• Family responsibilities

• Excessive screen time

• Poor sleep

• Social media exposure

• Information overload

Although these situations may not pose an immediate physical threat, the body can still respond with physiological stress reactions.

Over time, chronic activation of stress pathways can contribute to:

• Persistent muscle tension

• Fatigue

• Sleep disturbances

• Headaches

• Reduced resilience

• Decreased wellbeing

This is why activities that encourage relaxation and recovery have become increasingly important components of overall health.

What Happens During an Infrared Sauna Session?

Infrared saunas use infrared wavelengths to heat the body directly rather than primarily heating the surrounding air.

Most sessions occur at temperatures between approximately 45°C and 65°C, creating a comfortable but noticeable warming effect.

As the body warms, several physiological responses occur:

• Blood vessels dilate

• Circulation increases

• Heart rate rises

• Sweating increases

• Muscles begin to relax

• Core body temperature gradually increases

Although heat exposure represents a temporary physiological stressor, it occurs within a controlled environment. Researchers sometimes describe this type of exposure as a form of hormesis—a process in which mild, manageable stress encourages adaptive responses within the body (Laukkanen et al., 2018).

The Concept of Hormesis

Hormesis refers to the phenomenon whereby relatively small, controlled stressors stimulate beneficial biological adaptations.

Examples include:

• Exercise

• Fasting

• Cold exposure

• Heat exposure

These stressors challenge the body enough to trigger adaptation without causing harm.

Heat exposure from sauna bathing stimulates a variety of physiological responses that may contribute to adaptation across multiple body systems. Researchers continue to investigate whether these adaptations influence responses to future physical and psychological stressors (Laukkanen et al., 2018).

Promoting Relaxation and Recovery

One of the most commonly reported effects of sauna use is a profound sense of relaxation.

Many users describe feeling calmer, mentally clearer, and physically refreshed following a session.

Research suggests this is not merely anecdotal. Studies examining sauna bathing have identified associations with improvements in perceived wellbeing, relaxation, and quality of life (Hussain & Cohen, 2018).

Some studies suggest that sauna bathing may also be associated with physiological changes consistent with recovery and relaxation following heat exposure. However, the precise effects on autonomic nervous system regulation remain an area of ongoing research.

For individuals who spend much of their day feeling rushed, overstimulated, or mentally fatigued, creating dedicated time for recovery may be particularly valuable.

Reducing Muscle Tension

Stress and muscle tension are closely linked.

When people experience stress, muscles often tighten unconsciously.

Common areas of tension include:

• Neck

• Shoulders

• Upper back

• Jaw

• Lower back

Over time, chronic muscle tension can contribute to discomfort, headaches, reduced mobility, and general feelings of physical fatigue.

Heat exposure increases tissue temperature and circulation, which may help promote muscle relaxation and improve comfort. Many individuals report feeling physically lighter and more relaxed after a sauna session.

This physical relaxation may also contribute to feelings of mental relaxation and wellbeing.

Heat Shock Proteins and Cellular Adaptation

One of the more intriguing areas of sauna research involves heat shock proteins.

Heat shock proteins are molecules produced by cells in response to heat exposure and other environmental stressors.

Their primary role is to assist with cellular protection, repair, and adaptation processes.

Researchers continue to investigate the broader role of heat shock proteins in health, recovery, and responses to environmental stressors. While this field remains active, it represents one possible mechanism through which regular heat exposure may influence physiological adaptation.

Sauna Therapy and Mental Wellbeing

Mental wellbeing is influenced by a complex interaction of biological, psychological, social, and environmental factors.

While infrared sauna therapy should not be considered a treatment for mental health conditions, several studies have reported improvements in self-reported wellbeing, quality of life, and mood-related outcomes following regular sauna use (Hussain & Cohen, 2018).

Several factors may contribute:

Dedicated Downtime

Many people rarely spend uninterrupted time away from screens, notifications, and daily demands.

A sauna session creates a dedicated opportunity to slow down.

Physical Relaxation

Reduced muscle tension may contribute to greater feelings of relaxation and comfort.

Recovery Support

Activities that promote recovery often contribute positively to wellbeing and resilience.

Improved Sleep

Better sleep quality is strongly associated with improved mental and physical health.

It is important to note that sauna therapy should not replace professional treatment for mental health disorders. Individuals experiencing ongoing psychological distress should seek appropriate healthcare support.

The Sleep-Stress Connection

Stress and sleep are deeply interconnected.

Stress can disrupt sleep, while poor sleep can increase sensitivity to stress.

This can create a cycle that is difficult to break.

Some evidence suggests that thermal therapies may support sleep quality, which may in turn contribute to improved recovery and reduced perceptions of stress (Kräuchi & Deboer, 2010).

Many sauna users anecdotally report:

• Falling asleep more easily

• Experiencing more restful sleep

• Feeling more refreshed upon waking

While these experiences are commonly reported, individual responses vary and further research is needed to determine the extent of these effects.

Supporting Recovery in a Busy World

Modern life places significant demands on both the body and mind.

Whether someone is an athlete, business owner, healthcare worker, parent, or retiree, finding time for recovery can be challenging.

Infrared sauna therapy provides a practical opportunity to:

• Pause and unwind

• Promote relaxation

• Support recovery

• Create healthy self-care routines

• Prioritise personal wellbeing

For many people, this intentional recovery time becomes one of the most valuable aspects of regular sauna use.

Practical Recommendations

Individuals interested in using infrared sauna therapy for relaxation and wellbeing may consider:

• Two to five sessions per week

• Fifteen to thirty minutes per session

• Comfortable temperature settings

• Consistent scheduling

• Maintaining adequate hydration

As with any wellness practice, individual tolerance and preferences should guide use. People with medical conditions should consult an appropriately qualified healthcare professional before commencing sauna therapy.

The Bottom Line

Modern life places substantial demands on the body and mind.

While no single intervention can eliminate stress, infrared sauna therapy may offer a valuable opportunity to support relaxation, recovery, and overall wellbeing.

Current evidence suggests that sauna bathing may help promote relaxation, support recovery, and improve factors associated with wellbeing, including perceived stress and sleep quality. However, sauna therapy should be viewed as a complementary wellness practice rather than a treatment for medical or mental health conditions.

Although more research is needed to fully understand all of the mechanisms involved, regular sauna use appears to be a safe and enjoyable wellness practice for many individuals.

In a world that constantly encourages people to do more, move faster, and stay connected, spending twenty or thirty minutes in a warm, quiet environment may be one simple way to prioritise recovery and wellbeing.

References

Hussain, J., & Cohen, M. (2018). Clinical effects of regular dry sauna bathing: A systematic review. Evidence-Based Complementary and Alternative Medicine, 2018, Article 1857413. https://doi.org/10.1155/2018/1857413

Kräuchi, K., & Deboer, T. (2010). The interrelationship between sleep regulation and thermoregulation. Frontiers in Bioscience, 15, 604–625. https://doi.org/10.2741/3636

Laukkanen, J. A., Laukkanen, T., & Kunutsor, S. K. (2018). Cardiovascular and other health benefits of sauna bathing: A review of the evidence. Mayo Clinic Proceedings, 93(8), 1111–1121. https://doi.org/10.1016/j.mayocp.2018.04.008

McEwen, B. S. (2017). Neurobiological and systemic effects of chronic stress. Chronic Stress, 1, 2470547017692328. https://doi.org/10.1177/2470547017692328