The Russian sauna, also known as a banya, has been a cultural tradition for centuries and is believed to have numerous health benefits. One of the most popular practices in a Russian sauna is the use of birch whisks. Here are some of the benefits:

1. Promotes relaxation: The heat and steam in the Russian sauna help to relax your muscles, and the use of birch whisks enhances the experience. The leaves of the birch tree contain essential oils that are released when soaked in hot water. The aroma from the essential oils helps to calm the mind and reduce stress.
2. Stimulates blood flow: The use of birch whisks on your skin stimulates blood flow, which helps to improve circulation. Improved circulation can help to reduce muscle soreness and inflammation.
3. Exfoliates the skin: The birch leaves contain natural enzymes that help to remove dead skin cells, leaving your skin feeling soft and smooth. The whisking action also helps to unclog pores, which can reduce the risk of acne and other skin problems.
4. Boosts the immune system: The heat and steam in the Russian sauna can help to boost your immune system by increasing the production of white blood cells. The essential oils in the birch leaves also have antiseptic properties that can help to fight off infections.
5. Relieves respiratory problems: The steam in the Russian banya can help to open up your airways, making it easier to breathe. The essential oils in the birch leaves also have expectorant properties that can help to clear your lungs of mucus.

Overall, the use of birch whisks in the sauna can enhance the sauna experience and provide numerous health benefits.