There are four reasons for heat stroke in sports: 1, the problem of sports environment. In the high temperature, high humidity environment, such as noon, afternoon time outdoor sports, or in the non-ventilated, hot indoor sports, is easier to heat stroke. 2, the problem of personal constitution. Some people are born with abnormal thermoregulatory center, the body’s heat dissipation function is slightly worse than normal, so in the process of exercise, than normal people are prone to heatstroke. 3, drink too little water, resulting in a lack of fluid in the body, so less sweating during exercise, resulting in the body’s heat dissipation is a little weaker than normal, and thus prone to heatstroke. 4, exercise with disease. Appear to have a cold or long-term chronic illness, to exercise is also more likely to heat stroke.