It is the overall strength of practice, such as stone locks, which rely on the strength of the whole body. This is more common. There are also those sports that walk on the laundry list. First, they load things. After walking for decades, they can walk on empty baskets. It seems that this is called flying, but it is definitely not the kind that can fly. There are many skills, such as iron sand palm and red sand hand.

Few people really know this information, let alone get all the information online. I just heard of it, but even now, traditional practitioners don't go to the gym.