bad problems!!! easy question!!!!?

yes what mason said and drink plenty of water and no sodas. sodas cause arm pump. and ride looser.,

Stretching, it helps a lot for arm pump and back pain.

Go to LIVESTRONG.com they have stretching exercises on the site for all major muscles in the body.

Another thing that is helpful is Icy Hot Patches, they work well and fast.

Hope this helps

drink orange juice and eat bananas for the arm pump. as far as your back goes, take a really hot bath with some epsom salt, it always works for me. Tips for next time, dont have a grip death on the bars when your riding. And strecth plenty before you ride, if your racing, make sure you eat fruits and stuff between motos

Is your bike set-up for your height? That may be the cause of the back pain!

try to relax your riding style