I took my 10yo T1 on a 40 mile bike ride this weekend and made an interesting observation.....
So, we started the day with a good breakfast, and he spiked pretty high, but as soon as we started biking, it pulled him down pretty good, and we stopped for snacks several times. 20 miles in, we stopped for lunch, which he bolused for, turned around and headed back.
Pretty soon he started pulling low again, so I gave him some snacks -- a pretty hefty amount of snacks, including about half a clif bar, and some nature valley s'more things, probably a good 40 carbs or so.....
He stayed around the low 90's all the way back, maybe another hour and a half of biking.
Then we stopped and loaded the bikes on the car and headed off for some ice cream. Pretty soon, his blood sugar hit around 200 -- and this was before the ice cream!
I figured 3 units for the ice cream, and another 2 to cover what was left of his snack, and that turns out to have hit the mark pretty good.
The question is really about the weird rise after we stopped -- am I correct in thinking that this is the snack, which kept him from crashing during exercise, but once the exercise stopped, it sent him soaring?
Something to think about next time we do a long bike ride. He's wanting to train for a century -- maybe a bit ambitious, but we'll try for a metric century this August.
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