JDK's Taekwondo Blog is a contemporary online journal of Traditional Taekwondo.
Training methodology is the secret allowing modern practitioners to access traditional systems.
JDK practices in John Leckie Pavilion, College Park, Nedlands, Perth, Western Australia.
Ikigai has a fantastic post on Hojo Undo or body hardening called How Hard Should You Beat Your Body? I am extremely respectful of the amount of intensity and effort needed to do this. But this is not the way for all martial styles. Ikigai presents good objectivity and I'd recommend you look through the responses, including following the link and comment that I posted at his original post (this will hopefully set my perspective on Hojo Undo for traditional taekwondo beginners). This is fine example of my philosophy that there is no 'one way' for everyone. Cheers, Colin