Bruce Lee Jackie Chan, Jet Li, Sammo Hung, Donnie Yen and Jason Wu, these martial arts superstars are all in 169- 175. Why are they generally not tall? Is it related to practicing martial arts?

They never practiced martial arts since childhood, but later they practiced martial arts for work reasons. Low height is purely accidental! However, people who have been practicing martial arts for a long time or are in the growing period do grow very tall at this stage, because the people who practice martial arts do too much work, too much material is converted into muscle and energy, and too strong ligaments will also hinder their growth.