Have you seen this post? A few details here:
expired-glucagon
I have done mini-doses of glucagon when running. It did not work! All my liver glycogen was gone. Mini-dosing is not very useful for exercise.
I also did a mini-dose a day after being fairly depleted, and it did not bring me up as much as it did on other days. I am not sure if that is in a different thread, but it is somewhere on FUD, I know for sure.