I'll just tell ya what I do. I am in the process of training for a marathon and find being able to control my blood sugar has become key to gaining fitness. Are you on a pump?
What you said was true...and if our insulin levels are too high, we cannot metabolize lipid stores in our body either. So what I do to prepare for a run is this:
--Three to four hours before a run I eat something high in carbs (like 50 grams) with some protein and low in fat and bolus as normal.
--After the bolus is finished, I reduce basal down to 20-25% of the normal and wait three to four hours without eating, then go exercise.
-- Immediately after my workout I eat around 50 CHO and take a normal bolus. Most people say they don't need as much insulin after exercise, but I do, you my not.
By the time I go exercise my bolus insulin is gone for the most part and sufficient time has gone by so that my circulating insulin is low enough to go exercise. Before I exercise I always check BG. It is usually 140-160. Thats about where I like to be before a long run. About every four or five miles I need to suck down an energy gel (about 25 grams CHO).
When I get back my BG has consistently been in the 100-115 range. As for weight lifting, I find that no reduction in my insulin is needed. I still go low if I have eaten a large meal within an hour of going. I think all the active insulin from the meal tends to lower BG. But a light snack is no problem for me.
This is just what seems to be working for me right know. As we all know, everybody's body uses insulin differently. It took me a long time to find this works best. I would suggest not trying to train too hard too fast without first knowing, what active insulin will do to you during exercise.
But hey good luck with whatever you do. Enjoy the endorphins
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