Im not sure how many people here might ride motocross but i figured id share my thoughts on the the benefits (or lack thereof) of being on cycle.
Im a 450 B class rider on a 250 2 stroke. On cycle the bike feels lighter, i have more agression, but i get crazy muscle pumps and my hands and arms lock up. Because of this i think its actually hurting me lol. I have to stop and wait for my hands to relax. I dont think the pros use any sort of gear. I dont see much of a benefit for it to be worth hurting a professional career for those guys. Then again i have no idea if pro riders are drug tested.