wow - thats pretty good about your walk. the key to a good workout for me is 1)to have had a meal with a decent shot of insulin within the last 6 hours to make sure i have a good glycogen reserve 2)not to touch insulin for at least 4 hours preceding exercise 3)to have a tasty chocolate bar about an hour before. best chocs i think are ones that arent just pure choc and contain something that raises the GI such as glucose (mars bars!) etc. this flys in the face of what i have been advised but works for me!