Cuda, you are probably like me. I used to get what is called exercise-induced hypoglycemia which is that your blood sugar bottoms out because you are using all your glycogen stores during exercise. I had to sip either Gatorade or grape juice during my workout to get it to stop.
Unfortunately for me, I think it means you can be prone to having full hypoglycemia--which I now have which means your blood sugar can bottom out for various reasons or no reason at all. I now have what is called reactive hypoglycemia so about an hour after eating, my insulin goes nuts and my blood sugar goes down too far. I have to eat some kind of high-glycemic carbs to normalize my blood sugar. Hopefully, you won't have to deal with that later on because I've been told it is a precursor to diabetes.