There are not many benefits. Maybe the air is fresher in rainy days. There are many shortcomings. Running in the rain will make people think that this person will not be lovelorn? Will make others look at you with new eyes; When I was running, the rain soaked my clothes, pants and shoes, and it was uncomfortable to stick to my body. Moreover, exercise generates heat, alternating hot and cold, which is particularly prone to colds and fever. So it's better not to go out for a run in rainy days, which has many advantages and disadvantages.