Winter thermal circuits combine heat, cold, and recovery stimuli that trigger circulatory, neuroendocrine, and immune responses in the body. Research on saunas shows promising results, while the immune benefits of cold immersion still require further evidence. At The Cave, this experience brings together a Finnish sauna, Turkish bath, and ice bath right by the Mediterranean.
What is the connection between thermal circuits and the immune system?
The immune system doesn't work like a muscle that can be "strengthened" with a single spa session. Its optimal function depends on numerous factors, including rest, physical activity, nutrition, stress levels, and specific preventive habits.
However, controlled exposure to heat and cold generates physiological responses that are currently being studied for their potential link to immune function.
A study published in 2026 observed that a 30-minute Finnish sauna session produced a temporary mobilization of various types of immune cells. Previous research has also found changes in specific immune markers following repeated sauna programs, although broader studies are still needed to determine their clinical relevance.
Therefore, it is more accurate to view thermal circuits as a wellness practice that complements a healthy lifestyle, rather than a medical treatment designed to prevent infections.
However, controlled exposure to heat and cold generates physiological responses that are currently being studied for their potential link to immune function.
A study published in 2026 observed that a 30-minute Finnish sauna session produced a temporary mobilization of various types of immune cells. Previous research has also found changes in specific immune markers following repeated sauna programs, although broader studies are still needed to determine their clinical relevance.
Therefore, it is more accurate to view thermal circuits as a wellness practice that complements a healthy lifestyle, rather than a medical treatment designed to prevent infections.
Heat and cold: what happens during each phase of the circuit?
Thermal circuits combine different temperature stimuli that trigger distinct physiological responses. At The Cave in Balneario Illetas, the experience allows you to alternate between a Finnish sauna, Turkish bath, and ice bath as part of a routine focused on wellness and recovery.
• Finnish sauna: heat exposure promotes vasodilation, temporarily increases blood flow to the skin, and activates the body's thermoregulatory mechanisms. Additionally, saunas are being studied for their potential connection to certain changes in immune response, although they should not be considered a method for preventing infections.
• Turkish bath: the moist heat helps create a sense of physical relaxation and complements the heat phase of the circuit. The combination of temperature and humidity can be especially soothing during the winter months, when we crave spaces for rest and recovery.
• Ice bath: controlled exposure to cold triggers peripheral vasoconstriction and a rapid response from the autonomic nervous system. It is one of the hallmark elements of contrast therapy and is widely used in physical recovery routines.
• Temperature alternation: moving from heat to cold stimuli causes successive changes in circulation. This combination turns the circuit into an intense self-care experience, but available evidence does not allow us to claim that it directly strengthens the immune system on its own.
• Rest and recovery: the circuit makes the most sense when integrated into a healthy routine that includes sufficient rest, regular exercise, a balanced diet, and proper stress management. Wellness and recovery are key pieces for keeping the body in good condition throughout the winter.
• Finnish sauna: heat exposure promotes vasodilation, temporarily increases blood flow to the skin, and activates the body's thermoregulatory mechanisms. Additionally, saunas are being studied for their potential connection to certain changes in immune response, although they should not be considered a method for preventing infections.
• Turkish bath: the moist heat helps create a sense of physical relaxation and complements the heat phase of the circuit. The combination of temperature and humidity can be especially soothing during the winter months, when we crave spaces for rest and recovery.
• Ice bath: controlled exposure to cold triggers peripheral vasoconstriction and a rapid response from the autonomic nervous system. It is one of the hallmark elements of contrast therapy and is widely used in physical recovery routines.
• Temperature alternation: moving from heat to cold stimuli causes successive changes in circulation. This combination turns the circuit into an intense self-care experience, but available evidence does not allow us to claim that it directly strengthens the immune system on its own.
• Rest and recovery: the circuit makes the most sense when integrated into a healthy routine that includes sufficient rest, regular exercise, a balanced diet, and proper stress management. Wellness and recovery are key pieces for keeping the body in good condition throughout the winter.
Turn winter into your time for self-care
The colder months are a great opportunity to slow down and dedicate more attention to rest and well-being. A thermal circuit at The Cave allows you to combine heat, cold, and relaxation in a single space, right by the Mediterranean.
At Balneario Illetas, the experience can be complemented with massages and treatments tailored for wellness and recovery.
Discover The Cave this winter and book your moment of self-care at Balneario Illetas.
At Balneario Illetas, the experience can be complemented with massages and treatments tailored for wellness and recovery.
Discover The Cave this winter and book your moment of self-care at Balneario Illetas.
