Learn how to harden your shins
This exercise can be applied by qigong and muay thai practicioners. The rolling and knocking exercise increases the density of the bone and kills nerves. Basically it's the opposite of osteoporosis. (read more about osteoporosis) In Qigong, this exercise is used to harden the shin bones for externel qigong demonstrations. In muay thai this exercise is "sometimes" used to get more powerful roundhouse kicks. Find more qi gong lessons at qi gong main.