exercise bg rise

Lately my bg numbers have been erratic so I am checking them a lot. Today and yesterday I ate lunch at noon and by 2.30 my numbers were back to around 90. Then I went out to walk the dog for an hour and when I came back my number was 170. How does that happen? Does that indicate that I am not...

I just returned home from a 7-day wood carving class (~6 hr/day carving while standing) plus 1.6 walk each way to & from the workshop. My BG was VERY high all week, regardless of what, how & when I ate. The exercise level was more than I usually do, but not all that much. Very discouraging...