Exercise vigorously just after eating, and the digestive organs need a lot of blood supply after eating. If you exercise at this time, it is bound to steal a lot of blood from skeletal muscles and cause digestive tract ischemia. Not only the gastrointestinal peristalsis is weakened, but also the secretion of digestive juice is reduced, thus causing indigestion. Generally speaking, people who don't exercise regularly and people who are weak should exercise at 0.5 ~ 1 hour after meals, and strenuous sports competitions should be held at 1.5 hours after meals.
Exercise on an empty stomach is harmful to health, as is exercise on an empty stomach. Medical journal reports show that fasting exercise leads to dizziness, even vomiting, and "exercise hypoglycemia" appears, which increases the chance of accidental injury. Be sure to eat something easy to digest before exercise, such as bananas and raisins, so as not to feel uncomfortable because of hypoglycemia. So as not to cause heavy load injury and stress to the body.
Keep exercising during illness. Some people are very diligent and don't forget to exercise when they are sick. Many people think that continuous exercise is a kind of "exercise therapy" for some minor diseases with headache and brain fever, and the sooner you sweat, the better. In fact, this is one of the most dangerous concepts. During illness, human immunity and resistance will decline. If you feel unwell, you should stop exercising or reduce the amount of exercise. Otherwise, it will aggravate the illness and prolong the illness period. If you have dizziness, chest tightness, chest pain, shortness of breath and other symptoms during exercise, you should immediately stop all activities and avoid hard support. Especially middle-aged and elderly people, to prevent sudden death induced by exercise.