I don't often read the New Yorker (okay, I NEVER do), but I found a link to this article, about Alberto Salazar and his trainee, Dathan Ritzenhein, that was a very interesting read. It covers Salazar's career, along with his coaching philosophy and how one of his runners (Ritz) has struggled with a form overhaul. Of course I'm not even a fraction of the athlete Ritzenhein is, but I wonder if my foot injury may have come, as his did, from my attempt to change my form (i.e. landing more midfoot than on the heel). Not that I regret the attempt. In the long run, I believe it will make me faster and less injury prone. But I've been suspicious that the change may be partially behind my foot follies.
Either way, it's an interesting article and worth a read.