National defense students do not train with ordinary students, but also in Chang' an campus. I don't know how strong they are, and I didn't hear them say how bitter they are later. I usually run for exercise, but I don't think I have to run every day. In terms of dress, national defense students wear military uniforms unless they have activities, and they are casual at other times. Military uniforms are not worn whenever they want, and there are regulations that they cannot wear them at ordinary times. Military training is sometimes needed in summer vacation, but the time is not clear. In short, I feel that national defense students are similar to ordinary students, so don't worry. I am not a national defense student. I can't say clearly. I can only say by impression. I hope it helps you.