Interesting study. Points to 1:1 glucose:fructose ratio being pretty close to optimal. I suspect more will soon as well.

Fructose-Glucose Composite Carbohydrates and Endurance Performance: Critical Review and Future Perspectives

From that article:



Another interesting one:
Review: Glucose Plus Fructose Ingestion for Post-Exercise Recovery - Greater than the Sum of Its Parts?
From that article:


And another one pointing to utility of very high mixed sugar carbo oxidation rates as exercise exceeds 2 hrs:
Fructose and Sucrose Intake Increases Exogenous Carboydrate Oxidation During Exercise

From that article:

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