Experts say that people can't exercise when they have a fever, especially can't take part in strenuous exercise. This is because when you have a fever, the heat production in the human body increases, strenuous exercise accelerates the catabolism of muscle tissue, and the heat production also increases. In other words, people take part in sports when they have a fever, that is to say, heating up the heat is equivalent to "adding fuel to the fire", which will damage the tissues and organs of the body. What's more, when you have a fever, protein in your body will be decomposed in large quantities, and vitamins and many nutrients will be consumed in large quantities, which will greatly weaken your physical strength, reduce your immunity and disease resistance, and is very unfavorable to your health. In addition, when a person has a fever, his heart rate will be accelerated and his blood circulation will be accelerated. Every time his temperature rises by 65,438+0 degrees Celsius, his heart beats 65,438+00-20 times per minute, which increases the blood volume of his heart, thus increasing the load on his heart. If you do strenuous exercise again, it will further increase the burden on your heart, which may lead to acute cardiac insufficiency in severe cases. Therefore, after a cold and fever, you need adequate rest and treatment to help your body overcome the disease. If you take part in strenuous exercise when you have a fever, it will not only aggravate your condition, but also collapse and faint due to a lot of sweating. If you don't have a fever and only have cold symptoms, such as runny nose and sneezing, can you exercise? Generally speaking, cold symptoms are mostly caused by infectious diseases, such as viral cold and flu. If you do strenuous exercise in this situation, the virus will easily invade the internal organs, especially the myocardium, which will easily lead to viral myocarditis with serious consequences. Therefore, even the common symptoms of upper respiratory tract, such as runny nose, sneezing, stuffy nose and other minor cold symptoms, do not do strenuous exercise.