[Marie]

My son’s a highly active diabetic. Activity can actually screw up control for anyone using insulin and cause them to go low at night until they figure out how to manage the metabolic boost.

[Eric in the Ozarks]

A type 1 woman I knew in Denver had this problem. Exercise could pushed her into a fainting spell. Low blood sugar.
The only time I ever experienced this was when I was first diagnosed and was on insulin for about 5 weeks. If I wasn't careful, I could get a 20 on my meter. I take metformin now.