In recent years, the Finnish sauna has evolved from a Nordic tradition into a rapidly growing wellness practice worldwide – and Spain is no exception. More and more people are incorporating it into their lifestyle as a way to reduce stress, improve sleep and take care of their health naturally.
Its use has expanded well beyond spas and specialist centres. Today it forms part of at-home self-care routines, reflecting a clear trend towards at-home wellness and an interest in solutions that make consistent, accessible wellbeing possible.
This rise has also been driven by trends such as biohacking. Figures like Bryan Johnson, a tech entrepreneur focused on longevity, have popularised sauna use within protocols aimed at improving physical and mental performance.
In this context, a key question arises: which benefits of the Finnish sauna are actually backed by scientific evidence?
In this article you will discover, in a clear and reliable way, what the science says about its use, how to correctly incorporate it into your routine, and why more and more people consider it a long-term investment in health and wellbeing.
The Finnish sauna is a traditional practice based on exposure to intense dry heat, generally between 80 and 100 °C, with low humidity levels (10–20%).
This environment triggers a specific physiological response: the body activates mechanisms similar to those of moderate exercise, such as increased heart rate, vasodilation and intense sweating. ¹
Unlike other modalities, dry heat allows higher temperatures to be tolerated without a sense of overwhelm, which promotes more effective sessions.
Its traditional use also includes cycles of heat and cooling, which enhances its effects on the cardiovascular system.
The Finnish sauna is used to stimulate the body through dry heat, promoting circulation, muscle relaxation and general wellbeing. It can also help improve physical recovery and sleep quality when used regularly.
For a deeper look at practical use, you can consult this guide on how to use a Finnish sauna.
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Using a sauna after exercise can accelerate muscle recovery.
Increased blood flow promotes the transport of oxygen and nutrients to tissues, while heat exposure can stimulate the release of growth hormone, which is involved in muscle repair. ²
Evidence also suggests that heat exposure can aid recovery by modulating inflammatory processes and improving adaptation to training – particularly useful in sporting or high-demand physical contexts. ²
It has also been observed that this type of thermal stimulus can act as a form of “positive stress”, helping the body adapt better to future physical loads and improving muscular resilience. ¹
One of the most well-supported benefits is its impact on the cardiovascular system.
During a session, body temperature rises and significant vasodilation occurs, improving the elasticity of blood vessels and reducing blood pressure. ¹
This effect makes the sauna a kind of “passive workout” for the cardiovascular system, generating adaptations similar to those of moderate aerobic exercise. ³
Long-term observational studies have shown that frequent use (4–7 times per week) is associated with a reduction of up to 63% in the risk of sudden cardiac death and 50% in cardiovascular disease. ⁴
Improvements in endothelial function and blood pressure regulation have also been observed – key factors in the prevention of cardiovascular disease. ⁵
More recent research has evaluated protocols combining heat and cold. For example, 12-minute sessions at 90 °C followed by cold water immersion showed significant reductions in diastolic blood pressure after several cycles. ¹
This type of thermal contrast appears to enhance the cardiovascular system’s response and improve the body’s adaptation to thermal stress.
The Finnish sauna also acts on mental wellbeing.
The warm, quiet, distraction-free environment encourages disconnection, helping to reduce stress and improve mood.
This space for pause allows the nervous system to enter a state of deep relaxation, which can contribute to better management of daily stress and a greater sense of mental balance. ⁶
In Finnish culture, this practice is linked to the concept of “sisu” – representing mental resilience and the capacity to face challenges with calm and determination. ⁷
Dry heat induces intense sweating, which contributes to skin cleansing. This process promotes the dilation of pores and the removal of accumulated residues such as excess oil, dead cells and impurities, improving skin appearance.
Sweat is composed mainly of water and salts, and some studies have detected traces of compounds such as heavy metals in sweat, suggesting that certain substances can be excreted in small amounts through this process. ⁶
Unlike the steam sauna, the dry environment of the Finnish sauna allows for a more intense and controlled experience, promoting more efficient and sustained sweating. ⁸
Beyond its immediate benefits, the Finnish sauna is associated with long-term effects.
Recent scientific reviews have linked regular use to a lower incidence of chronic diseases, including hypertension, cardiovascular disease, cognitive decline and respiratory problems. ⁸
Reductions in inflammatory markers and an increase in protective cellular proteins (heat shock proteins), linked to protection against cellular stress, have also been observed. ¹
These mechanisms are directly related to healthy ageing processes, reinforcing the sauna’s role as a tool to support longevity. ²
The science speaks for itself – but the benefits of the sauna only accumulate with regular use. And nothing makes that consistency easier than having a sauna at home.
Casetas de Jardín 24 manufactures outdoor saunas in its own factory in Estonia, using high-quality Nordic timber and over 20 years of experience. More than 8,850 buildings delivered across Europe – built to last and built to be used.
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Some contemporary health optimisation approaches, such as Bryan Johnson’s protocol, incorporate the sauna into structured routines with the goal of improving longevity and overall performance.
His protocol involves daily sauna sessions of 20 minutes at 93 °C, alongside hydration and recovery strategies, as well as the combination of heat and cold.
In his records, after approximately 23 sessions, changes in various physiological markers were observed, associated with a lower estimated biological age. ⁹
In today’s pace of life, finding genuine moments of disconnection isn’t always easy. Daily stress, responsibilities and lack of time mean that self-care often takes a back seat.
In this context, having a sauna at home completely transforms the experience. It’s not just about occasional wellbeing – it’s about creating a space to return to, where body and mind can recover consistently.
Every space and every routine is different. Choosing the right sauna isn’t just a matter of design – it’s about how you want to integrate this habit into your daily life.
For a traditional experience, the Oliver II Finnish sauna recreates the classic dry heat atmosphere, ideal for those who value authenticity and regular use.
For those who want to go a step further, a solution like the Devon 3 timber cabin with sauna allows wellbeing to be integrated into a multifunctional space, turning the garden into a natural extension of the home.
For smaller spaces or a distinctive aesthetic, the barrel sauna with terrace offers an efficient and visually striking alternative for creating an outdoor retreat.
Beyond design, the quality of a sauna is felt in every detail.
Saunas made with Nordic spruce, such as those offered by Casetas de Jardín 24, stand out for their ability to retain heat efficiently and create a stable environment throughout each session.
This type of timber, traditionally used in countries with a long sauna culture, also offers excellent resistance to moisture and the passage of time – even outdoors.
The result is a space that not only delivers wellbeing in the present, but maintains its performance and appearance over the years, becoming a solid investment in health and quality of life.
It’s important to understand that not all saunas offer the same effects on the body. The Finnish sauna and the steam sauna (also known as a steam bath) operate on different principles, impacting both the experience and the physiological benefits.
| Feature | Finnish sauna | Steam sauna |
| Temperature | 80–100 °C | 40–50 °C |
| Humidity | Low (10–20%) | Very high |
| Cardiovascular impact | High | Moderate |
| Sweating | Intense | Moderate |
| Sensation | Deep dry heat | Enveloping moist heat |
If the goal is to maximise cardiovascular benefits, physical recovery and metabolic impact, the Finnish sauna is generally the recommended option, as it allows higher temperatures to be reached while maintaining low humidity.
The Finnish sauna has established itself as a relevant tool within modern wellness, associated with improvements in cardiovascular health, physical recovery and mental balance.
Beyond its immediate benefits, incorporating it into daily life is a way of investing in longevity – committing to habits that contribute to long-term wellbeing.
Having a sauna at home makes this easier, allowing you to incorporate this ritual simply, without depending on schedules or travel, and adapting it to your lifestyle.
At Casetas de Jardín 24 we would be delighted to help you find the sauna that best fits your project and accompany you in creating a space that not only delivers wellbeing today, but becomes part of your health for the future.
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