Thanks for these replies. I am now beginning to work out the physiology of it all. Looks like my liver goes into overdrive when I exercise without first eating anything in order to bang out the energy reserves. I think I will take the advice and try eating breakfast before going to the gym...
My readings are higher in the morning after fasting and a work out in the gym. By the afternoon the readings are lower, after taking them about two hours after eating. Any theories as to an explanation?