I'm new to the world of training but after getting back on my dirtbike today for the first time since winter I realized how completely out of shape I am. I am plenty strong and already pretty thin with little to no fat on me. My question is what kinds of exercises should I do to build Endurance instead of strenght and mass. I know that with more strength comes endurance, but in the sport of motocross it pays to be as light as possible. My plan is to just do 30-45 minutes of cardio every single day wearing all of my riding gear to simulate the extra weight and also heat retention. I plan to do my cardio on a Healthrider machine (Don't laugh, it's all i've got, and 30 minutes on it when it's 90 outside will put a workout on you) but I was also wondering what kind of exercises besides cardio I can do to help out with endurance in my arms/wrists/fingers as these are the first parts of my body to wear out. It actually gets to the point that I can't even pull in my clutch lever no matter how bad I want to because my whole arm is numb. My fingers and wrists go completely numb to the point that it hurts to move them at all for about 5 minutes after I pull off the track. Any ideas on how to improve forearm endurance without adding mass, because adding mass will actually cause my arms to pump up quicker.