Sauna therapy is the practice of exposing the body to controlled heat, typically between 70°C and 100°C, to stimulate circulation, encourage the body’s natural repair processes and support recovery and overall wellbeing. For thousands of years, cultures across Scandinavia, Japan and Eastern Europe have used heat bathing as a ritual for health, recovery and mental clarity, and modern research is increasingly exploring what those traditions understood. Regular sauna use is now associated with benefits for cardiovascular health, recovery, stress regulation and long-term wellbeing.

Sauna bathing places mild stress on the body, similar to light exercise, and over time the body adapts.
Ember & Ice Wellness

What happens to the body in a sauna

When the body is exposed to sauna temperatures between 70°C and 100°C, several physiological responses occur. Your heart rate rises, circulation improves and the body begins to sweat as it regulates its temperature. This heat exposure is associated with:

• Increased blood circulation
• Activation of heat shock proteins
• Improved vascular function
• A raised heart rate, similar to moderate exercise
• Deep muscular relaxation

Together, these responses support tissue repair, metabolic efficiency and resilience to stress.

The cardiovascular research

Some of the most compelling sauna research comes from long-term cardiovascular studies in Finland. One widely cited 20-year study following over 2,300 men found that frequent sauna use was associated with lower cardiovascular risk: those who used a sauna 4 to 7 times a week showed lower rates of heart disease and sudden cardiac events than those who used it once a week. The likely reason is that sauna bathing places mild stress on the cardiovascular system, similar to low-intensity exercise, which over time is associated with a stronger heart and more elastic blood vessels.

Heat shock proteins and cellular repair

Heat exposure activates specialised proteins known as heat shock proteins, which are thought to play a role in:

• Repairing damaged cells
• Protecting against inflammation
• Supporting healthy protein folding within cells
• Supporting immune function

In essence, they act as a cellular repair system, helping the body recover from stress, which is one reason sauna therapy is now being studied in relation to healthy ageing and longevity.

Sauna and mental wellbeing

Beyond the physical, sauna bathing has notable effects on the nervous system. Heat exposure is associated with the release of endorphins and dopamine, creating a deep sense of relaxation and mental clarity. Regular use has been associated with:

• Reduced stress and anxiety
• Improved sleep quality
• Better mood and relaxation
• Lower cortisol levels

The ritual of heat, stillness and recovery creates a powerful environment for nervous-system regulation.

Recovery and athletic performance

Athletes have used saunas for decades to support recovery after intense training. The increased circulation from heat exposure helps deliver oxygen and nutrients to muscles while supporting the clearance of metabolic by-products. Benefits many athletes report include:

• Reduced muscle soreness
• Faster recovery between sessions
• Improved flexibility and mobility
• Better endurance adaptation

This is why saunas are now widely integrated into elite performance centres, professional sports facilities and recovery clinics.

Traditional vs infrared saunas

While traditional Finnish saunas remain the gold standard, modern technology has introduced new options.

Traditional saunas run between 80°C and 100°C with dry heat from a heater and sauna stones, delivering the most intense cardiovascular and sweating response.

Infrared saunas operate at lower temperatures, between 40°C and 65°C, using infrared panels that warm the body directly, and are often preferred for longer, gentler sessions.

Both offer real benefits, and hybrid systems can combine the advantages of each.

How often should you use a sauna?

Research suggests the most significant benefits come with consistent use. Many longevity experts suggest:

• 3 to 5 sessions per week
• 15 to 25 minutes per session
• Optional cold exposure between rounds

This kind of routine helps the body build long-term resilience and adaptation.

The rise of home wellness spaces

As awareness grows, more people are bringing sauna therapy into their homes. Luxury outdoor saunas, indoor wellness rooms and contrast-therapy spaces are increasingly popular in private residences, hotels and wellness clubs. Modern designs combine architectural aesthetics, advanced heating technology, smart temperature control and integrated lighting and sound. Premium outdoor cabins such as the Mira sauna range are designed to sit seamlessly in a garden while delivering a traditional Nordic sauna experience.

Sauna as part of a complete wellness system

Sauna therapy is powerful on its own, but its benefits grow when combined with other modalities. Many wellness spaces now integrate contrast bathing, cold water immersion, red light therapy and breathwork alongside sauna use, creating a system that supports both physical recovery and long-term health. Contrast therapy, which alternates hot and cold, is particularly effective for supporting circulation and nervous-system regulation.

The future of heat therapy

Saunas are no longer just a traditional ritual. They are increasingly recognised as one of the most effective natural tools for supporting cardiovascular health, recovery and overall wellbeing. As research continues, sauna therapy is becoming a cornerstone of the modern longevity movement.

At Ember & Ice Wellness, our mission is simple: to bring science-backed wellness into beautifully designed spaces that support health, performance and longevity. Explore our indoor sauna, outdoor sauna and contrast bath collections.

Sauna use is intended for general wellbeing, and research findings describe associations rather than guaranteed outcomes. If you are pregnant, have a heart condition or another health concern, speak to a qualified professional before starting.