[VLM]

You're probably on to an interesting idea. Another topic to google for is blood sugar and insulin levels immediately after exercising.

I once worked with a type-2 and a type-1 diabetic (not the same guy obviously) and as you'd expect with a control loop malfunction illness, both predictable and unpredictable effects were in play.

If I recall correctly the type-2 guy complained that his innards would release lots of glucose while exercising and continue shortly after but his insulin production (or response?) was not so good, so his blood sugar measurably spiked high after exercise while the type-1 had his drop unless he adjusted his dosages. Or perhaps it was the other way around wrt the type 1 guy and the type 2 guy.

Being a spectrum disease, I suspect even a "healthy" individual might have some peculiar short term changes to blood sugar and/or insulin levels.