i usually go low in my art class every other day in high school since im in 10th grade. its around 11:15 ish.
and i usually go high like to 240, 300 AFTER i excercise. meanwhile, my school nurse always tells me that
everyone else whose diabetic in the high school usually goes LOW after exercising. pretty weird.
I used to experience the same thing with highs after exercise and finally asked my Dr about it. My problem was that I was lowering my insulin before to keep from getting too low, but exercising when your sugar is too high is also dangerous.
Here's a link to some info from the Mayo Clinic: www.mayoclinic.com/.../DA00105
Hope it stabilizes for you!