Running to the gym or outdoors in winter?

Insisting on outdoor running in winter has advantages in improving physical fitness, which can integrate the body with cold weather and improve the adaptability of the body to the environment. This is why athletes train outdoors in winter instead of indoors.

If compared from the point of view of exercising heart and lung function, whether running outdoors or running on the treadmill in the gym in winter, you can achieve the effect of exercising. However, if you want to exercise well, it is recommended to run outdoors on the premise of good air quality.