| Hi Schlep,
There are a couple of reasons that I can think of.
Our meters are really only accurate within about a 20% range per government regs. I've tested twice in a row from the same site and gotten numbers with a 20% difference.
If you aren't used to exercise or your sugar was too low to start, your body may have perceived the walk as stressful and caused your liver to release sugar into your blood to deal with the "fight or flight" response. This should improve as your exercise more regularly. If I wear uncomfortable shoes and my feet hurt during a walk, my sugar goes up due to the pain stress.
If you went too low during your walk, the above response would have happened, causing you to be slightly higher at the end of your walk. You may need a little snack at the beginning.
Don't assume any of these until you've done tests before, during and every hour after exercising (for 4-5 hours.) Only then will you know what's really happening. I'm sure you will get responses from others with more suggestions.
Mich  | 
