Maybe motocycles races people have more energy to stick around afterwards since they did very little leg work :-)
Yeah right! Next time you see Mose Howard ( Current FTR 2009 Enduro champ and former Expert MTB race champ) Ask him how easy Moto racing is compared to MTB racing.. after all, all you gotta do is turn the throttle, right?
Unless we are talking about MTB studs that ride single speed solo events of 6,12 and 24 hours... then mabe Moto could be easier.
* Never been to the Swamp Squiggy but thought RTR to a good job too.