Frequent cold water stimulation can stimulate people's brain, body organs and nervous, endocrine, respiratory and other systems, so that the whole body can be greatly excited and regulated, promote human metabolism, rejuvenate, improve immune function, resistance and self-repair ability, and prevent and treat chronic diseases.
When entering the water, the skin is stimulated by cold water, which makes the skin capillaries shrink sharply. With the continuous exercise, the body begins to heat up and the capillaries begin to relax, which can improve the elasticity of blood vessels and make the human body adapt to this alternating change of cold and heat. Therefore, the body will turn red after winter swimming, just like coming out of a high-temperature sauna, indicating that the capillaries have been fully relaxed.
Extended data:
Precautions for winter swimming:
Patients with heart disease, hypertension, epilepsy and other diseases are not suitable for winter swimming. Ordinary people must swim in winter step by step and stick to it for a long time, and the time to go into the water should not be too long. Those who want to try winter swimming should start from summer and stick to autumn before they can try winter swimming. It can't be done overnight.
Ordinary winter swimmers should not challenge the limit, but pursue the length of winter swimming in low-temperature waters, because once the human body's ability to resist the cold is exceeded, human organs such as the heart may be seriously injured.
References:
Scientific winter swimming step by step-People's Network