I'm doing a motocross race 1/25, I've always had issues with arm pump during races, I'm a little worried being on PP will increase the pump of my forearms much quicker and a lot worse.
FYI: Arm pump while riding a dirt bike on a national level motocross tracks greatly prevents me from being effective on the bikes. It gets so bad that I cant even twist the throttle or pull the clutch in, that can be pretty dangerous!