No, the body needs detoxification after 9 pm, and this time is not suitable for exercise. Generally speaking, you can run as long as you have time, but there are times when you shouldn't exercise. First, people who are weak and sick should not exercise at night. Because the evening is the worst time for people's physical strength, it is not suitable for the weak to exercise at this time. Second, it is not advisable to exercise before going to bed. Because exercise before going to bed easily affects sleep. If you are free, it is recommended to exercise around 9 am 10, and it is also good to exercise at 4 pm. At this time, people's physical strength is the best. In addition, it should be noted that the interval between exercise and eating is about 30 minutes to an hour.