Because it takes a long time to get the benefits that can be seen by continuous exercise and fitness. Few people are willing to spend so long or so much energy to do such a thing. So no one wants to put money here.

In fact, the process of throwing money out is actually called investment. You can invest in others or you can invest in yourself. So many people are willing to pay.

But the premise must be that I think this matter is a straightforward interest. If I can see this benefit soon, it is even better.

On the other hand, continuous exercise or fitness does not conform to this concept at all. You put yourself first, and the effect is not obvious. You need to have strong self-discipline or self-control.

Moreover, they are not sure that there must be a good result or a good income, so most people don't want to have this kind of investment because they need to pay too much and are not sure about a good result. This is why few people are willing to spend money to do this kind of continuous exercise and fitness.