The ‘N-word’ is perhaps the most sensitive word in the English language, yet it is often used casually as part of common trash-talk, or even a term of endearment, on the playing field.

We’ve heard of high-altitude pressure chambers, but in applying actual pressure changes, from sea level to more than 20,000 feet, CVAC pods might be the new training rage.

If the thrill of the run doesn't do it for you, the scenery will. Check out these awesome marathons...