Why do people who practice traditional Wushu are basically around 170cm or below, while those who practice Sanda are between 175cm and 185cm?

Most people who practice traditional martial arts practice since childhood, and their nutrition can't keep up. They are poor in literature and wealth, and have no economic foundation, which affects their physical development. Nowadays, the inheritance of traditional Wushu has lost many essential parts of internal cultivation, and poor maintenance will hurt the body. Nowadays, people who practice Sanda take the commercial route and are operated by brokers. According to the current scientific theory, nutrition is the latest, and the degree of practice does not exceed the body's endurance. Moreover, people with tall bodies and good bones have high advantages in strength and endurance. The current Sanda team selection system has requirements: how much height and weight must be achieved. So it seems that Sanda people are generally taller.