I have been wondering lately how, when on insulin, you detect protein and exercise. I wonder because my experience (without taking insulin) is that high protein increases my BG levels by around 0.5mmol/l and exercise will reduce my BG levels by 0.5 mmol/l, this give or take 0.25mmol/l depending on quantity of protein or amount of exercise (to get a 0.5mmol/l reduction for me is around 20min run or 1hr on exercise cycle). Where I am coming from is that I understand 0.5mmol/l = around 1/4 unit insulin..... In the scheme of things, 1/4 unit insulin is so small as to be almost insignificant, isn't it?.....Thus my question!.
It's significant for me, simply because of the knock on effect each day..... I can take an increase of 0.5mmol/l from a base of 4.6mmol/l, but I can not take an increase of 0.5mmol/l two or 3 days consecutively....I would then be 6.1 (well above my normalized target)...... My carb intake is constant (30g / day) my protein varies (maybe 1/2 chicken one day, salmon the next).
My target is to keep my 2+hr dinner reading below 4.6..... If it is over 5.0 I exercise..... My pre breakfast reading is nearly always around 0.5mmol/l higher than my 2+hr dinner reading.... Unless I exercise after dinner.
If you are on insulin and find you are 0.5mmol/l higher than your 'target', how do you know whether it is because you have taken 1/4 unit insulin to little, or because you have eaten too much protein, or maybe not exercised as much as the day before?.
Or is this (almost insignificant) '1/4 unit insulin' variance the reason why many T1's say exercise and protein make no difference.....just a thought.