First of all, people who often go to the gym may be demanding of themselves. In my opinion, people who are in good shape and can insist on going to the gym are very self-disciplined. We all have a desire for good things. After reaching a standard, we will naturally set our sights on a higher place and insist on climbing there. People who exercise regularly must have this mentality. Obviously I am not fat, but I am still not satisfied, so I insist on becoming a frequent visitor to the gym. Maybe their figure is perfect in the eyes of others, but they have higher requirements for themselves. Some people feel that their body fat rate is not low enough, while others want to make themselves stronger. Not everyone can have a good figure, only very self-disciplined people can get it.
Secondly, some people often go to the gym, or maybe they just like it. I have a friend who is a fitness instructor. He obviously has a good figure, but no matter whether he is traveling or busy with work, he will go to the gym to run whenever he has time, and sometimes he will be very happy even if he just runs. These people are addicted to fitness and can enjoy the fun it brings them. They feel happy in sweat and breathing.
According to my friend, fitness is addictive. As long as you feel the benefits of fitness, you won't give up easily, and this will always persist. For them, enjoying fitness is fun, not torture, which is why people with good figure will get better and better.