Good sources to learn about knuckle and body conditioning?

[Ivan]

I am interested in learning more on this topic, and hopefully to reference some of these sources on an article I wish to write about it. I know it's prevalent in many different martial arts styles such as Karate and Muay Thai.
What do you guys know about it?

 

[jobo]

I am interested in learning more on this topic, and hopefully to reference some of these sources on an article I wish to write about it. I know it's prevalent in many different martial arts styles such as Karate and Muay Thai.
What do you guys know about it?

percusive exercise thicken bone, restance training thicken bone, that really all you need to know, apart from hitting your self with things, punching walls etc is a silly and possibly harmful way of doing it