From an article by Angus Phillips in this morning's Washington (DC) Post: "The American Journal of Public Health recently published results of a survey of 122 Canadian hockey players showing high levels of carbon monoxide in the blood of some after games, evidently from skating vigorously on indoor rinks after gasoline-powered Zamboni ice-cleaning machines finished dressing the surface." Well, maybe I won't be quite so anxious to sit at ice level anymore !! Seriously, perhaps someone with access to this journal might post a more comprehensive summary - are fans at risk as well as players ?? I can't imagine this is a big health risk, though I do remember being evacuated from Snively Arena at UNH some years ago when a refrigerant line 'neath the ice sprang a leak and began venting ammonia gas into the rink. Jim [log in to unmask]