1. Exercise in winter to eliminate fatigue. Accelerate blood circulation, increase oxygen supply to the brain and enhance blood vessel elasticity. This can eliminate the brain fatigue caused by long-term work, enhance memory and improve study and work efficiency. 2. Exercise in winter enhances resistance. Accelerate the metabolism of the body, the body is stimulated by cold, which will increase the antibodies against diseases in the blood, and the body's resistance to diseases will also increase. 3. Winter exercise enhances cold resistance. People who exercise in winter will have stronger cold resistance than the average person. Because people exercise in a cold environment, it can improve the excitability of the cerebral cortex, promote its coordination with various organs and systems in the body, enhance the function of the central nervous system to regulate body temperature, and balance the heat generation and heat dissipation in the body, thus making the body adapt to cold weather. 4. Exercise in winter to prevent osteoporosis. You can fully enjoy the sunshine. After the ultraviolet rays in the sun are absorbed by the human body, cholesterol in the blood can be converted into vitamin D, which promotes the absorption of calcium by the human body. 5. It can strengthen the heart. Cold weather also makes the heart load more when distributing blood to the whole body. Regular exercise of cardiovascular endurance can strengthen myocardial function, even in such cold weather, preparing for more arduous training in the future-not to mention other non-sports stresses in life. 6. It helps to improve your mood. Exercise in cold weather also helps to improve mood because of lack of humidity and the ability to kill stimuli. Exercising in cold weather will increase your happiness. 7. Precautions. 9 am to 10 am is appropriate, and foggy days are not suitable for outdoor sports. It's best to choose a place far away from traffic arteries to avoid inhaling automobile exhaust, which is harmful to health. Pay attention to keep warm, put on your coat in time at intervals and at the end of exercise to prevent colds.