Originally Posted by
Enthalpic
It all comes down to improved insulin sensitivity; after exercise you can get similar to “normal” uptake with less insulin, or more uptake with the same amount of insulin (provided you have eaten enough carbohydrate).
As for extra insulin production, I am not certain but I doubt it. With all the glucose uptake already going on additional insulin production would put you at risk of hypoglycemia. Protein / AAs may complicate this in that you may see more insulin after a post-exercise Carb&Pro feeding when compared to a post-exercise Carb only feeding, but I doubt you would see extra insulin if you compared it to a rested Carb feeding. So it’s not really more than normal, just more than the exercised control.
What do you think?
Yes, what you say makes sense, thank you for clarifying that. So although the body is able to take absorb glucose more readily, in the window stage, it is not because of increased insulin production, but because of increased cellular sensitivity to glucose as a result of exercise.
So unless there is a feedback loop that is directed my insulin receptors there would not be more or less insulin in the blood because the insulin feedback loop is proportional to glucose levels. So it remains that insulin levels will act as they always do but exercise will make the cell more receptive to glucose increasing uptake, and not as a result of more insulin than would normally be present.