This thread do not talk about aikido but talk about a concept in martial arts I thought it might interest some ppl here
Have you ever wondered how can Karate and Kung Fu practitioners break woods and bricks by their bare hands ? … Well at least I wondered a lot as a martial artist and a doctor … how can the human hand tolerate such a big trauma and still in one piece??
I had one instructional DVD about how they train for such martial art practice … they call the techniques for breaking is the ( Iron Hand ) Technique … the idea has many rules and it's not done haphazardly … one rule which is this illustration about is the formation of ( Callus ) in the hands
Callus is a new bone formation after bone fracture … they hit parts of their hands in bricks and woods for a long time daily which will causes small fractures in the hand bones leading to formation of new and stronger bone in the area of the fracture … and by this the bones of the hand become so strong to tolerate such trauma … of course there are other things like type of material for breaking and the angel of impact … ect …. But here I wanted to illustrate the anatomical part of famous ( Iron Hand )
This illustration I did for medical curiosity reasons and to present it in a lecture ... it clarifies this concept ... I hope u like it ( click to enlarge ) :