Talking as a T1, but we aim to have a blood sugar between 4 & 7 (sorry old school and in the uk) and if it is 5.5 it has nothing to do with if my nutrition is good or bad, if I need to eat or I am hungry. The problems for T1 and the reason we need to monitor, is that we have to introduce insulin into our system in order to make up for what we can’t produce, this makes it a lot harder to “stop”, in a normal, when the sugar level gets to 4 the body stops producing insulin and glucogen is released to bring the sugar level back up, in a T1 this doesn’t happen so the glucogen is released and is still fighting the insulin in the system.
In a normal if you are doing a TT, you can get away doing a 10 mile TT without food as the body will dump glucogen into the system and absorb that with insulin giving you the perfect blood sugar, if you eat before … it wont. and the insulin will absorb the sugar in your blood from the food … both could give you the same blood sugars, only one is correct, I would have though that unless you understand what is going on in the rest of the body, only seeing your blood sugars it would be very easy to make big mistakes
Lots of people ask me to do a blood test when they first see my glucose monitor, and I stopped doing it a long time ago as there are so many things that contribute, heat, time of day, when you last ate, anxiety e.t.c so it only causes miss information, miss direction and anxiey, this is my fear with this.