Jeepers what a waste of 5 minutes of my life . Like most things that CL posts about I think he's more or less right or at least more right than wrong; I doubt that Usain Bolt does much long distance chugging but I'm sure he does do an awful lot of running in short spurts at full pelt. Ditto I suspect that Paula Radcliffe does an awful lot of long distance stuff but at an uncomfortably hard pace most of the time.

I on the other hand don't give a flying duck and just run as often and as far as I like at whatever pace I want to. To me its all about being in the hills, with running being my preferred method of transporting myself around them.