Panagiotis97, as retired said but remember to have a good daily calcium intake, you can whack you shins with hard objects and it does deaden the nerves but in a very bad way.
when you hit a heavy leather bag the heavy leather bag is heavy and hard but not as dense or as hard as your shin bone but still enough to toughen you up, you dont damage your shin bone when hitting a heavy bag but you will damage your shin bone if you strike it with something harder than your shin bone, when you shin block a roundkick that is the only time you really want to risk the injuries and shock that will occur after such strikes, you dont want to start whacking your shin bone with a bottle, thats stupid, it does kill the nerves but doesnt toughen the actual shin bone itself.
I disagree with many peoples thoughts that the shin bone doesnt toughen, my shins have got lots of lumps on them and a sort of soft cement like crap under the skin which is on the shin bone, this happens when kicking the heavy bag or pads for a long time but appears very easily when striking another human being. I aint a doctor but I done a bit of research and it seems the body recognises that there is a lot of stress being placed on that part of the body, the shin bone sends out little signals to the brain to tell the brain to send more calcium and the crap that builds up bone to that area of the shin, it then calcifies and the bone does toughen. My teacher in Thailand has a shin bone that covers his entire front, where I would have soft muscle he has bone! that is a perfect example of calcification. It starts of soft, then graduaully through time it grows and hardens grows and hardens, thats what you want to be aiming for not killing nerves by hitting bottles or bars over you shins, that is dumb. Just be patient and kick heavy bags.
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