ive spoke to a few people who suggest its the lack of carbs the last few day thats decreased glycogen in the muscle.
Also i dont see any difference in taking insulin just before eating or just after.
all the guys i train with we all take it straight after meals. even if you have released your own insulin, the insuilin that you have injected is still pusghing the nutrients.
its doesnt just go nahh not gna do anything now coz hes relieased his natty slin lol
shooting with a meal or directly after is different than an hour later
especially if you only had a shake (probably with whey and dextrose huh? dextrose is pretty much completely out of your blood after 1 hour)
you can even get natty hypoglycemia because of that (reactive hypoglycemia)
so if you have a fast acting shake and then shoot insulin an hour later there are essentially NO NUTRIENTS LEFT to push into the muscle lol
there is your answer
insulin is not hard to predict at all unless your insulin sensitivity or your activity level (while the slin is active) drastically changes