Gym running is generally an equipment running, because few gyms have a 400-meter track. Equipment running means that the strength of running is transmitted up and down, while the strength of our outdoor running is transmitted back and forth. Generally, equipment running is at a constant speed, but the frequency and rhythm can be changed at will according to the runner's rhythm outdoors. One is active and the other is passive, but in fact, the sports effect is much worse. Now it's breathing and cooling, and the outdoor air is flowing, which can provide a good environment for breathing and body cooling, while indoors, the air circulation effect of general gyms is not as strong as outdoor. However, the advantage of this equipment is that it can still exercise in windy and rainy days. You can only choose sunny days outdoors. For example, there is pollution, smog and dust in many places in northern China, while there is rainy season and typhoon season in southern China. It is difficult for people who want to run every day to go out for a run in this weather.

Because gymnasiums are generally used for equipment training, the flexibility and flexibility of human bodies can not be well exercised, so it is best to go to gymnasiums with some training methods such as running, swimming, yoga, martial arts, rock climbing and jumping to increase the flexibility of human bodies and achieve better fitness purposes.