If you do weights and/or go to the about max of what you can manage, (sweating within a couple minutes, struggling for breath) you'll find your BG goes up (stress hormones, trying to 'compensate') = anaerobic, you cannot get enough oxygen around the system for what you do.
This in me normally stays that way for a couple hours.
When that subsides (you can compare it to DP in a way), your muscles and liver will start replenishing their stores from your blood stream, and you BG will go lower than the start.
For me on insulin, that's something to consider a bit more carefully, for you, I think it's just a pleasant fact
Linking this excellent page for you again that has been linked a few times before. Navigating the site is a bit of a nightmare, but the information is brilliant
http://www.runsweet.com/DiabetesAndSport.html
It deals a bit with Type 1s on insulin, but some of the hormonal stuff it describes can be used by 'anyone' if you apply a bit of common sense, which I think you generally tend to be capable of :wink: