I am testing the biomechanical properties of shin pads and comparing them over different sports (e.g. rugby, football, cricket, a martial arts…..any more ideas??) but need information about what forces spin pads normally endure during sports (i.e. if a cricket ball hits a shin pad, if a football hits a shin pad in football, how much force does the shin pad endure?) but I have no idea where to get this kind of information from. Journals and books would be the best but any source would be good for the time being.