I know glucose can go up during exercise, but I tested this morning about 30 minutes after finishing an hour long run, and my BG is at 8. That's the highest number I've seen on a meter since...well, not sure. It's been a while. It's perplexing, and slightly concerning, but I guess I'll just check again in an hour. I really should get a cgm and get a better picture of what really happens when I run fasted.