First, run before meals, because the stomach is empty, and there is no new fatty acid in fat cells, but if you exercise, you can draw it out and convert it into calories and consume it. Therefore, jogging for half an hour or brisk walking for 40 minutes before meals can play a role in losing weight.

Second, if you run after a meal, it takes time to stabilize because the digestive function has not slowed down. Suitable for walking after meals, but you must not engage in strenuous activities. Rest for more than half an hour after exercise before meals, because the muscles and joints of people after exercise are sore and tired, and exercise consumes a lot of sugar, fat and protein in the body, which will happen. Therefore, it is better to lose weight by running before meals.

Precautions for running before and after meals:

You shouldn't run again half an hour before meals. Digestion of gastrointestinal tract needs the participation of digestive juice, and the brain should have enough time to secrete digestive juice half an hour before meals to facilitate the peristalsis of gastrointestinal tract during meals. On the other hand, it should be noted that you should not engage in too strenuous activities before meals, which will easily reduce the secretion of digestive juice, and breathing heavily during exercise will also affect people's appetite.

If you want to run after a meal, you should rest for half an hour to give the gastrointestinal tract a time to digest, so as not to reduce the blood in the digestive organs and affect the digestive function. It is not advisable to do strenuous exercise within half an hour after a meal. After strenuous exercise for at least one hour after a meal, it will not only affect the digestive function, but also cause gastrointestinal diseases such as abdominal pain and gastroptosis.