joe_papp said:
Actually, the BBC recently published a piece contending that helmets don't necessarily increase the safety of the rider to the degree that is generically assumed by both cyclists and drivers on the open-road...
http://is.gd/eIGuw
"While many cyclists wouldn't leave home without clamping on their helmet, Dr Ian Walker, a professor of traffic psychology, has long believed head protection can work against someone on a bicycle..."
I've seen other studies and arguments that helmets can affect both driver and cyclist perception. I recall this being a particularly hot topic in Australia in the past couple of years(?) as helmet laws have fairly recently(?) come into effect there.
Basically it boils down to:
-Wearing a helmet
may help you have a better outcome in the event of a crash - there is plenty of anecdotal experience to support this (and of course it seems intuitive) but no long-range studies that I know of.
VS
-Forgoing a helmet
may help you avoid a crash either because drivers give you wider berth or you take staying upright more seriously. This seems less intuitive at first but certainly does have merit when you stop to think about it for a minute. Again, nothing conclusive to fully support or refute it.
That's right, folks - no certainty either way. We'll just have to live with that.
Given that driver and cyclist perceptions and behavior will vary widely with culture, landscape, population density, and even (especially!) across individual cyclists and motorists, I don't think any behavioral study can claim wide applicability. So in my (hopefully) reasonable way of looking at it, this is a case where it's up to each individual to make as informed a decision as possible. Ergo, I know my town and local riding area quite well and I never ride without my helmet - but I do not find it appropriate for governments to tell all citizens that they must do so.
As far as applicability to professional cycling (back to the OP), according to the "better crash outcome vs lower crash possibility" approach, at first blush it would seem that they should definitely wear helmets because they will crash. We've all witnessed enough bike racing to know that. OTOH, they are professionals who learn both superior bike handling and crash management skills over years of training. In a race situation, a helmet arguably would not affect driver or rider behavior a la the BBC study. There are plenty of professional crashes (the majority, I'd say) in which the helmet is far from a deciding factor in the medical outcome. But in the truly horrific crashes - Casartelli, Kivilev, Horillo, for example - I can't believe that the
insurance (not guarantee, mind you - insurance!) of a helmet is not worth it. And since these horrific crashes can happen, I do believe pros should wear helmets.