How long to run varies from person to person, generally normal adults can run for half an hour.
Running is an aerobic fitness exercise, which can improve cardiopulmonary and vascular functions, increase metabolism and slow down the aging of organs.
Running should be gradual within the tolerance range, you can run intermittently at the beginning, and gradually increase the running time and distance; generally speaking, the running time is controlled in half an hour, and the distance is controlled in 3 to 5 kilometers is more appropriate.
Elderly people can shorten the time and distance appropriately, and the young people can extend the time and distance appropriately; try to avoid running half an hour before meal, one hour after meal and one hour before bedtime.
If you feel unwell, consult a doctor in time.