Since we have no mention of a home glucose
test meter in your post my question to you is how do you know when your blood glucose
is going down? And when? See this link on when to test your blood glucose before, during, and after a workout. http://www.mayoclinic.com/health/diabetes-and-exercise/DA00105
As Sally mentioned, it is best to monitor your blood glucose with a home test meter.This is the only way to know, besides being tested at the doctors office, your glucose levels.