Is it possible for a muscular man who has never practiced martial arts to win a fight with a girl who has practiced martial arts?

Don't say that you are a girl who has practiced martial arts. Even if you haven't practiced, you can win a fight with you. If you are muscular and heavy, then even if you practice, your sister will win less. If you are about the same weight, she has a very good chance of winning. You are a good hand and she is a clever one. These two sentences are contradictory. Whether the spear can stab the shield or the shield can stop the spear depends on the specific person's situation and the situation on the spot, and cannot be generalized. Don't say that you are a girl who has practiced martial arts. Even if you haven't practiced, you can win a fight with you. If you are muscular and heavy, then even if you practice, your sister will win less. If you are about the same weight, she has a very good chance of winning. You are a good hand and she is a clever one. These two sentences are contradictory. Whether the spear can stab the shield or the shield can stop the spear depends on the specific person's situation and the situation on the spot, and cannot be generalized.