Originally Posted by
njkayaker
...But the effectiveness is "self evident". It is then surprising that racers (who, presumably, fall/crash much more frequently) don't already do it....
How do you know this? It could be that many of them have also learned some form of martial arts or tumbling, possibly in the same proportion as other people. Or if not, it shouldn't be that surprising that bicycle racers lack other skills which may benefit them. There are probably any number of such skills.