As long as you have enough strength, no matter how big it is. Fighting depends on courage, and there are prescription bricks around to fight directly. Fighting also has the ability to change confessions and reactions. This is not a technical term, it is not profound at all. You get used to it when you play too much. You don't have to fight too hard at ordinary times. It is enough to buy a sling. The sling is longer than the knife, the knife will leave scars, and the sling will directly break the bone. As long as you can react quickly and let a guy fight three times. This is not a professional practice of fighting. It's good for self-defense If you want to fight, you'd better learn Sanda directly.

If you exercise, you are too light. Drink less and eat more meals, eat more food from protein (an egg in the morning and a bag of milk at night), go to bed early and get up early. If you don't go to the gym, choose to exercise at home in the afternoon. Push-ups, sit-ups, squats and pull-ups are all common fitness methods. Don't exercise excessively and pay attention to rest. Want to exercise the explosive force of the arm, buy an arm strength device, as long as tens of dollars. Practice several times when you are bored, and the effect is remarkable. There is also a grip device, which can exercise grip strength and a certain degree of wrist strength. Don't underestimate the grip, you can use it in fighting.