Does exercise enhance resistance or decrease immune system? Many studies show that exercise does affect the immune system, but it is not entirely correct to say that exercise immunity will be good. According to Dr. James Turner, a researcher in sports physiology and immune biology at the University of Bath, the impact of exercise on the body is an immune response, in other words, exercise will * * * or start a normal immune response. In other words, when you are exercising, your heart rate will increase, which will make your body feel stressed. At this time, neutrophils and lymphocytes in the body will have a congestion reaction. David Nieman, a researcher in sports immunology, also said that exercise can accelerate the circulation of immune cells in the body, and immune cells are more likely to find viruses or undesirable pathogens. In addition, according to a study of more than 65,438+000 adults in the British Journal of Sports Medicine in 2065,438+00, people who exercise at least 20 minutes a day and at least 5 days a week are less likely to get respiratory diseases than those who sit for a long time. When people with regular exercise habits get sick and catch a cold,
Excessive exercise leads to decreased immunity. Although many studies show that exercise can increase resistance, some studies also show that excessive and high-intensity exercise that the human body can't bear can also lead to decreased immunity. According to the questionnaire survey conducted by Gatorade Sports Science Research Institute on 1996 for 2,700 coaches and sports trainers in high schools and universities, as many as 89% of the respondents believe that excessive sports training will affect the immune system, thus making athletes prone to illness. However, in 1997, a survey on exercise reducing immunity found that within 1 ~ 2 weeks after strenuous long-distance race, the probability of getting respiratory tract will increase, and the probability of getting sick will be higher as long as the ideal training amount is exceeded. However, the decline of immunity caused by exercise is short-lived and will recover within a few hours. For long-term excessive exercise, due to the phenomenon of single exercise accumulation, a larger window period is formed.
Such exercise will not reduce immunity, but although strenuous exercise will reduce immunity, people who don't exercise can actually do some light exercise to increase their resistance. According to the study of 547 healthy adults in the University of South Carolina in 2002, after 1 year follow-up, it was found that the risk of respiratory diseases was reduced by about 20% by keeping about 6METs (metabolic equivalent) of exercise, while the exercise of 6METs was about 6 km/h, which was almost equivalent to walking 2-3 steps at 1 second. Therefore, walking exercise can actually enhance immunity, but for people who want to lose weight, they must exercise with higher load.
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