Is fitness useful? What is the function of fitness?

You insist. I used to keep fit for a year. Anyway, my figure has improved, which can be seen. In fact, Keep helps me the most. I was in poor shape before, so I was embarrassed to go to the gym. Everyone is muscular. When I stand, it looks like a branch, or the thinnest one. It's funny to think about it. You don't have to worry about these problems when you use Keep fitness. You don't have to look at others at home anyway. So I've been using Keep for a year, and I've been training my muscles. Now, although I don't have eight abdominal muscles, hehe, there are four, happy. Fitness still needs to be persisted. This year, whether going out to play or on a business trip, I can't practice every day.