I didnt really like doing the 400 and whatnot on them foreboding rocky dirt trax, and am not that fond either with the nauseating plastic-synthetic surfaces either.
This may be a first time question on here but would surfacing high school & college stadium tracks with poly, pro ride, tapeta, etc help our Usain Bolt proteges? I sure ran a good 1 1/2 minute faster on my mile run on hollywood park track than i did at ANY high school plastic surface. fairly comfortable afterwards less fatigue than usual. memorable experience, hope to do it again this summer.