Running in the gym is very different from running outdoors, so running in the gym is a last resort. Because breathing fresh air is not good for our health, the space of the gym is usually closed, and most gyms may be underground. Because the underground rent is cheaper and the gym doesn't need particularly good lighting, there is something wrong with the air circulation in the gym.

Running outdoors in winter or summer is better, because we can breathe fresher air when running outdoors. But choose a more suitable time and place, because at six or seven o'clock in the morning, people in the downtown area of the city are working, so. There is something wrong with the freshness of the air. If you want to run, it is a good choice to get up at 5: 00 in the morning, because the air is fresh and there is not so much car exhaust at this time. If you run at night, you will concentrate on seven or eight. At that time, the amount of automobile exhaust was not particularly large.

Running outdoors is more conducive to people's exercise, because there are all kinds of terrain changes outdoors. Whether it is a flat city road, you can see all kinds of scenery. It's much better to run completely motionless in the gym and the treadmill, because the treadmill is in a fixed position. Running in the city can't see all kinds of scenery, and it can also make the whole people feel better, because you will feel particularly fulfilled when you see the land behind you being left behind by yourself step by step, because running is a very boring activity.

Therefore, when people's physical conditions permit, try to choose outdoor running. If it rains and snows, there is really no way to choose to go to the gym, because the gym is really more in place in terms of temperature and risk control, which is less harmful to people's health.