I know that mildly elevated blood sugar is common after intense exercise, but mine was really high the other day.
I do a ~24 hour fast once every week. At about 21 hours in, I checked my BG, which was in the 80s (a little high for me fasting, but not bad), and then decided to do some exercise. I did some jogging for 15-20 minutes, and then ran some intense interval sprints. I was pretty worn out by the end. I got some water and went home. About 20 minutes or so after the workout, I checked my BG again. It was 143. That didn't seem right, so I checked again. And then again. All the results were within 5 points of the original. It took a couple hours to come down. After 3 hours it was down in the low 70s.
I am young and healthy and usually have very good glucose control. I have a nice low fasting glucose, and my postprandial glucose seldom exceeds 100 -- even with potatoes.
I suppose it might have simply been a lot of adrenaline from the workout freeing glycogen in the presence of low insulin, but I've never seen a post-workout result that high. Usually it's no higher than ~105.
Has anyone else here ever seen post-exercise glucose this high?