How can we tell who knows martial arts and who doesn't?

As you can see from the way you stand, people who have practiced martial arts are generally defensive.

For example, people who practice Tai Ji Chuan are relaxed and generally don't stand up straight. On the side, heavy shoulders are a bit like hunchbacks. When I am alone, I feel very dull and boring. Bagua walks without lifting his heels, and his feet are mostly parallel to the ground, which looks like grinding the ground. Some people practice iron sand palm or something, with four fingers on one side and a flat fist front. It's hard to tell without looking carefully.

People who practice martial arts generally have sharp eyes, but there is still myopia. And it doesn't always look sharp, most of them only appear in combat. But whenever you look at it, your eyes will shine. The arm muscles are generally developed in the deltoid and forearm muscles of the shoulders, while the biceps and triceps of men are not very developed. Don't lift your elbows very high, generally don't leave your ribs, and the distance from half a punch to one punch is separated.