Where is the starting point of human vitality?

A healthy human body should be in the best comprehensive state and full of vitality. Therefore, the starting point and ending point of essence are all in the whole human body.

I understand that what you mean may be the spirit of practicing kung fu, which seems to be cultivated by Taoism. You can search yourself.

Sperm, if understood as sperm, starts from testis; If it is understood as spirit, starting from overall health, or starting from the environment of heaven and earth (absorbing the aura of the sun and the moon, the essence of heaven and earth), or better understood as the Milky Way (geomantic theory) ... If you want to study life, you must put more energy into it.