Benefits of winter swimming: it can exercise muscles in all parts of the body, stimulate subcutaneous capillaries, and promote subcutaneous fat to release energy, thus playing an effective role in reducing fat. It can also enhance cardiovascular function, strengthen vascular elasticity, and make myocardium stronger, and effectively prevent various heart diseases, arteriosclerosis and hypertension. It can also enhance people's lung function, expand vital capacity, improve people's resistance and immunity, and prevent colds. Disadvantages of winter swimming: jumping into cold water without fully warming up will make the body violently stressed and lead to a cold. If you don't warm up, you will cramp. In the process of winter swimming, due to a large amount of energy consumption in the body, hypoglycemia reaction is prone to occur, and adverse reactions such as dizziness, fatigue and nausea will occur.