i dont reially injure anything a lot, but my knees and hands usually hurt a ton, hands from catching myself when i fall and knees just from being ghey, i try to wear kneepads every time i ride but even with those sometimes i just fall straight onto one or both of my knees and they just refuse to work right after that, i dont think its gunna get any better either, now that my right knee is messed up even worse, its probably gunna be even more prone to injury from now on