Close to all you need to know:
http://www.hammernutrition.com/za/HNT?PAGE=TRAININGTIPS

You can go with more natural products as well. Keep natural products really soft. You don't want to me digesting anything. Your heart rate will be too high.

Some natural ideas here:
http://www.socaltrailriders.org/foru...ms-dr-lim.html