First of all, healthy people are more likely to appear happy.

A healthy person may be unhappy all day, but an unhealthy person is hard to laugh. A healthy body is one of your own assets, so that you can have motivation instead of getting sick every day.

A person who exercises regularly shows that this person has a high probability of having a strong body, which can make him energetic when doing most things, and the comfort of the body will naturally make a person look happier.

Second, when you exercise, your mind is empty, which makes it easier to laugh.

I think people's troubles can be temporarily suppressed in a short time when they are exercising. When they are doing sports, they only have their own projects to complete, and everything else is put aside, so that they can feel pure happiness. If you are a person who doesn't exercise very much, such people often think more, and it is even harder to be cheerful.

Third, because I vented my depression during exercise.

Fitness can not only improve a person's physical strength, but also make a person's body healthier. There is also a great role, that is, you can let your depressed mood vent. There were some difficulties and depression before fitness, but after fitness, these depressed emotions will be improved with sweating all over, which is also a great miracle of fitness.

So why exercise more? Of course, because you are healthy and naturally comfortable and happy.