I am not a doctor, I am a person with Type 2 diabetes. I share things I'm going through and often just learn the hard way. Here is an example...
Have you ever seen a child that is calm, passive and a joy to be around until.... "Wasn't it a lovely idea to give Susie that candy bar. She sure did enjoy eating it." 30 minutes later... "What in the world is wrong with Susie? She is so hyper and can't sit down. I don't understand?"
Yes you do.
You just flooded her system with sugar. Because she is young her body absorbed the sugar quickly and sent the body into hyper mode. The sugar has to be burned off somehow and movement is the simplest solution.
As a diabetic our body doesn't process the sugar as quickly thus the sluggish, tired feeling. As your body tries to break down the sugars it is working hard making us somewhat tired or extremely tired depending on
the amount of sugars it has to break down. Wow I have to say just sharing this helped me to understand the process I hope it helps you.