Personally, I think it is more appropriate to exercise for 60 minutes at night. First, the air quality in the morning is poor, and many pollutants in the air have not drifted away with the fog; Second, the body organs that just got up in the morning have not fully awakened, and it is easy to feel soft when exercising; Thirdly, from the perspective of personal schedule, you need to eat breakfast in the morning, prepare for work in a hurry, and be more free after work in the evening. Exercise after a busy day is helpful to relax and sleep. But at night, we should pay attention to the time and intensity of exercise, the time should not be too late and the intensity of exercise should not be too high.