But the assumption still holds true that dosing fructose at the levels “typically” associated with hitting 100g of carbs per hour on a regular basis to fuel intense workouts is not enough to “chronically exceed the capacity of the liver?” Is that right?
The 300 calorie difference could easily be supplied by oxidising your fat reserves.
It’s only 0.55g of fat per minute which is well below the peak rates you’ll see in well trained endurance athletes.
That really depends on the duration of the event. But the key is at 200W you can get 300 calories an hour from fat oxidation. But you have to have trained it.
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