It'd better take an hour or two. It's dark at the end of summer, about seven or eight. At that time, the oxygen content was quite high. In winter, I am used to running at about eight o'clock in the evening, which is only 800 meters, and I have been out of breath for half a day. I didn't breathe so much when I ran1200m in the afternoon. Why don't you run before dinner? Then come back and rest for about half an hour, and then you can eat. That's good, too