First of all, there is still a big difference between fitness and fighting. Fighting exercises agility, speed and strength in attack and defense. It takes a lot of training to achieve the expected results. If the training degree is not enough, it is difficult to achieve the combat effect. If the training level is too high, it will cause damage or strain to the body. This degree is difficult to grasp.
Secondly, it is now a society ruled by law. You have developed your fighting skills. If you continue to kill or maim people with one punch, you will hurt yourself for life.
And through fitness, you can make your muscles collapse and scare your opponents, and defeat the enemy without fighting!
Finally, fitness is to exercise, the ultimate goal is to improve physical fitness, but also to complete their ideal state: let girlfriend like muscles, let opponents fear self-defense function.