First of all, Bruce Lee also does a lot of sports. His whole body is almost full of tight muscle tissue. As an Asian, it is difficult for him to be as big as some bodybuilders, but it is normal for him to have big muscles after settling down. If ordinary people put in the same or greater amount of exercise, they can also have this effect. Because everyone's bone structure is different, the muscle size of latissimus dorsi depends on the proportion of your body. The above are personal opinions and are for reference only.