Why are there so many muscular men in Africa?

All muscles are in the same shape but it's just the amount of muscle that makes the difference African and Chinese people just have different facial features, skin color and so on People with the same amount of training have the same body shape The facial features are given by their parents and they can't be changed Chinese people can also get a tan to become the skin color of an African person I think as long as they work hard they all look good