First, going to the gym will have economic pressure. Compared with free sports venues, gyms are more expensive sports platforms. So more people are willing to go to the gym for the money they spend, which means that economic pressure pushes them to work hard, so I think going to the gym will be more motivated.
Second, it is more professional to work out in the gym. Gyms are often equipped with very professional fitness teachers and coaches. So you will be safe when you exercise, and you will not worry about your muscle strain or bone injury. When you don't exercise in the gym, you may pull a muscle, which will bring you pain and injury. So I think the gym is safer than the gym.
Third, in the gym, not only the weather factors are controllable, but also the air quality is guaranteed. As we all know, when we are not in the gym, we may often postpone fitness activities because it is raining today and it will be hot tomorrow, which is a major drawback of fitness. But when we work out in the gym, this disadvantage can be completely avoided. In a completely indoor environment, fitness with high-end equipment can make our exercise persist and achieve better results.