[Uhhrrr]

Geez - just run downhill. Problem solved.

EDIT: OK, now that I actually read the article, it turns out the Boston Marathon is ineligible for records for just this reason - it's overall downhill. With that attitude, why not just require galoshes while you're at it?

[amaks]

Actually running marathon distance downhill is very hard on quads, so for Boston people specifically train running downhill. In fact, for any marathon event, training course usually closely resembles the event (e.g. hills, downhill, level sections).

[x0x0]

those courses are ineligible for records