It is said that lung capacity can run more than ten kilometers, which is definitely not low. After all, he is not practicing long-distance running, but practicing martial arts.
Strength, Bruce Lee is the absolute peak in lightweight, and it is difficult to compare with him in general middleweight physical fitness. Only the heavyweight has the weight advantage can surpass him;
Speed, Bruce Lee's speed does not need to be questioned;
Reaction, Bruce Lee has practiced to don't need to rely on thinking to control the fist. Most people want to fight somewhere, or they will fight indiscriminately, but Bruce Lee won't. This is what he himself said in enter the dragon. In the movie, he borrowed the characters to express his realm.
To sum up, Bruce Lee's physical fitness is certainly better than IP Man's. Actually, there is no need for any reason. Is there any comparison between an old man with a lightweight peak and a mature man?
A strong man can't say that his physical quality is better than that of a thin man, because physical quality includes many things, but if light is better than strength, he must be a strong man. Bruce Lee has the first physical strength and super strength in the lightweight, but there is still a big gap compared with the heavyweight.