Cold showers create a stimulation of blood circulation. This is because exposure to extreme cold can trigger a response from the sympathetic nervous system, resulting in the narrowing of blood vessels to conserve body heat. This forces the lymphatic system to pump lymphatic fluids throughout the body more efficiently, eliminating bacteria, microbes, and cell waste, thus cleansing the body. After the cold shower, when the body warms up, blood vessels dilate, promoting better blood circulation and helping improve the delivery of oxygen and nutrients to tissues.

Regarding the reduction of inflammation, exposure to cold can have anti-inflammatory effects, helping to reduce inflammation in the body through the increase of noradrenaline. This neurotransmitter can significantly reduce inflammation and help reduce chronic pain. Additionally, many people report a sensation of increased energy and alertness after a cold shower, which is related to the release of neurotransmitters such as noradrenaline, which are involved in regulating mood and disposition.

Although the direct connection between cold showers and the immune system is still being studied, there is evidence that acute cold stress can trigger immune responses, such as increasing white blood cell production and releasing cytokines, which are proteins involved in regulating the immune response, resulting in a strengthening of the immune system.

The practice of cold showers can help the body adapt and become more resistant to stress, both physical and mental. This can have positive effects on overall health and the body's ability to cope with external challenges. Taking cold showers before bedtime translates into improved sleep quality and reduced insomnia, as one of the major obstacles to falling asleep often lies in having a very high body temperature.

Cold showers can play a significant role in physical recovery, especially for athletes and individuals involved in high-performance sports activities. However, it's important to use this technique in moderation and in conjunction with other recovery strategies such as adequate rest, proper nutrition, and stretching.

Immersion in cold water can help reduce muscle and joint inflammation after intense exercise. The cold helps to constrict blood vessels, reducing blood flow to inflamed areas, thus decreasing swelling and associated pain.

Exposure to cold can provide relief from exercise-induced muscle soreness, helping to reduce the sensation of pain and discomfort after intense training. This can facilitate recovery and allow for greater tolerance to subsequent training. Similarly, this exposure to cold can help accelerate the muscle recovery process, allowing athletes to recover more quickly between training sessions. This is especially important for high-performance athletes who have a rigorous training schedule and need to maximize recovery time.

Additionally, besides injury recovery, cold showers can prevent such injuries by keeping muscles and joints healthy and well-recovered. Furthermore, by promoting improved blood circulation, aiding in the delivery of essential nutrients and the removal of metabolic waste, it fosters more effective recovery.