How will saunas and cold therapy boost immunity?

Sauna and cold exposure: a New Year's restart for your immunity

The New Year is the perfect time for new resolutions and investments in your own health. If you are looking for a natural and effective way to boost your defenses against viruses and colds, you will find the solution in ancient rituals of alternating heat and cold – sauna and cold exposure.

These practices are not just a fashion trend, but demonstrably stimulate the body and mind, and above all, significantly strengthen the immune system. Prepare for winter better and start training your resilience.

Cold exposure

Cold exposure is a huge hit in recent years, and it's no wonder. Cold exposure, whether in the form of cold showers or swimming in icy water, is controlled exposure of the body to cold. It represents stepping out of the comfort zone for the body, forcing it to adapt quickly. Short but intense exposure to cold triggers a cascade of positive reactions in the body:

• Immunity boost: Regular exposure to cold (e.g., a cold shower) demonstrably increases the number of white blood cells, thereby improving the body's defence. Dutch studies have shown that people who regularly take cold showers take almost 30% fewer sick days due to illness.

• Mental reset: Immediate cold acts as a powerful mental detox. It teaches the body to cope with stress and releases endorphins, which is great motivation for exercise and overall well-being. Cold water activates the sympathetic nervous system (the "fight or flight" response). This leads to a sudden increase in hormone levels such as noradrenaline, which has strong anti-inflammatory effects and modulates immune functions.

• Better circulation: Repeated exposure to cold trains blood vessels to react quickly and flexibly (constriction/dilation). This improves the body's ability to regulate temperature and better tolerate transitions between warm and cold environments, thus reducing susceptibility to colds.

If you are tempted by ice lake swimming, start at home. Just 30 seconds of cold water at the end of your shower is enough for visible improvement.

Sauna

While the cold shocks the body, sauna deeply warms it, which is ideal post-workout recovery and a great way to gain energy in winter. The sauna is one of the oldest and most pleasant methods of thermotherapy. Its key benefit for immunity lies in simulating a mild fever (hyperthermia).

• Detoxification through sweat: The heat from the sauna causes intense sweating, effectively removing waste products from the body, which is a great addition to your New Year's detox.

• Cardiovascular training: Being in a hot environment increases heart rate, simulating mild physical activity – ideal training for the vascular system.

• Muscle relief: Heat relaxes tense muscles, which is important not only for athletes but also for those struggling with back pain caused by a sedentary lifestyle. How to sauna correctly? Don't forget to cool down gradually between cycles for maximum effect.

• Disease prevention: Studies suggest that regular sauna use (at least 1-2 times a week) can reduce the risk of colds and flu by up to 30-65%.

Important advice: Never go to the sauna or try cold exposure if you are already ill or have a fever. These practices serve as prevention, not as treatment.

Sauna bathing is an ideal practice that you can enrich with aromatherapy and the healing effects of essential oils (also called essences). Thanks to the heat, the oil molecules are released into the air and affect us not only through smell, but also through skin and respiratory tract, synergistically strengthening immunity and the relaxing effect of the sauna.

Boosting immunity through scent

Sauna bathing is a physical detox and training for the body. If you add essential oils to this ritual, you are transforming it into comprehensive aromatic therapy that specifically strengthens your health and psyche. The heat from the sauna multiplies the effects of essences, which contain concentrated active plant substances with proven antibacterial, antiviral, and anti-inflammatory properties.

Key essential oils for strong immunity

To boost defence and relieve airways during the flu season, these essential oils are ideal:

How to safely use oils in a Finnish sauna?

When using essential oils, dilution and oil quality are key. Use exclusively 100% natural essential oils, not synthetic fragrance substitutes.

1. Dilution is key: Never pour pure, undiluted essential oil directly onto hot stones! This could lead to ignition and burning of the oil, resulting in unpleasant, irritating smoke instead of a pleasant aroma.

2. Preparing the infusion: Add only 3 to 5 drops of essential oil to a bucket of water (approx. 0.5 – 1 liter).

3. Application: Slowly and carefully pour this diluted mixture onto the hot sauna stones. The steam will then effectively spread the medicinal molecules throughout the sauna, where you can inhale and absorb them through your skin.

4. Alternative (e.g., in an infrared sauna): If you have an evaporation dish with water, add the drops to it, allowing the scent to be released gradually.