The bone density of the strengthened part is bigger and stronger, and the attack power is of course increased. The benefits are not only the attack power, but also the defense power.

There is a video to watch online. Sweep back and volley back at the other side. As a result, one leg was broken and the other was completely fine. This is the advantage of strengthening hardness.

In actual combat, it often happens that the attacker hits the defender's elbow during the attack, and as a result, the attacker is injured and the defender is basically fine. If the attacker practices his fists and feet hard, he can avoid injury relatively.

In fact, this extreme is just the obvious person you see. In fact, there are such people in relatively large gyms or martial arts schools.

For example, the "king of squats" and "king of bench presses" in the gym are all like this, that is, the comprehensive strength can't reach the highest level, and it can only be satisfied if you practice well.

There are also people with the highest kicking or the strongest fists in the martial arts school, who can show their skills in front of new people. This is probably the only way to prove their ability when their comprehensive strength is not up to the highest.