Hey, I was wondering does anybody here have a good way to toughen up shins/top of feet?. Whenever I start to kick my boxing bag I can only do between 5-10 before I have to change legs because they start to hurt (abit like when you kick a football without any shoes on). Kicking a kickpad (or whatever they're called) is ok it is only when I kick something reasonably solid, like a boxing bag, that they start to hurt a little. So is there a way to toughen them up or do I have to just keep on kickin and they will toughen eventually?. Cheers in advance.