I said I’d post my revelation when I got around to writing it, then failed to link to it yesterday when I posted the whole explanation on my other blog! Anyway. Here it is.
(This post was also the reason I experienced inbox madness last night. Leo Babauta tweeted a link to it – he has something like 68,000 Twitter followers – and the response was incredible. So many nice comments from so many people I either just met last weekend or don’t know at all. Wow.)
Dev on Running 