It is interesting to note that some of the greatest runners in history never iced. I never iced as a runner, but I did so several times after a football game and it does help with soreness. I didn't read the report, but it seems to me that icing is perhaps helpful for your legs immediately after a hard workout to recover quicker. I am speaking in terms of how it makes you feel, but I don't think it has any long term therapeutic or performance benefits. I made ice baths available but never mandatory during mu coaching days. I've had some good athletes who did it fairly regularly, but 2 of the best athletes I ever coached never did. I know for a fact that a proper massage prior to a race helps.