Fasting prior to exercise limits use of blood glucose?

I am certainly not too good with matters of science, so I’m hoping you science geeks will comment.
It appears to me that not only does fasting prior to exercise increases fat utilization but it also prevents the use of blood glucose.

Am I reading this correctly?

If yes, what does that mean in regards to eating prior to HIMs and IMs?

http://jap.physiology.org/content/110/1/236.full

Don’t eat before and or during a HIM or IM and you will bonk. Tim

Dr. Asker Jeukendrop has been looking at this topic and is encouraged enough to begin doing some of his training in the fasted state with the hope of improving the percentage of fuel he derives from fat.

Hugh

Our present findings therefore provide evidence to indicate that regular fasted training is a useful strategy to stimulate physiological adaptations in muscle that may eventually contribute to improve endurance exercise performance.

So we may be able to “teach” (physiological adaptation) our bodies to obtain a larger % of our fuel from fat?

Start with this article at Hammer Nutrition.

http://www.hammernutrition.com/knowledge/proper-fueling-pre-workout-amp-race-suggestions.1279.html?sect=advanced-knowledge-section

Our present findings therefore provide evidence to indicate that regular fasted training is a useful strategy to stimulate physiological adaptations in muscle that may eventually contribute to improve endurance exercise performance.

So we may be able to “teach” (physiological adaptation) our bodies to obtain a larger % of our fuel from fat?

That’s what Asker thinks may be true.

Hugh

I hate to not be able to support this with a link, but I read on here somewhere about a study where the results suggested increased fat utlization “training” came at the cost of efficiency in carbohydrate breakdown once reintroduced on race day.

thats all I got, maybe someone will chime in with a link.