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Carbohydrates have become the easiest macronutrient to blame.
They are accused of causing fat gain, inflammation, metabolic dysfunction, and energy crashes. Entire diets are built on eliminating them.
But for endurance athletes, carbohydrates are not the enemy.
They are the fastest usable fuel source the body has for high-output work.
The issue was never carbohydrates themselves.
It was context, dose, and metabolic environment.
When you understand how ATP is produced under load — and what actually limits threshold and VO₂ performance — the fear narrative collapses.
In this issue, you’ll learn:
What carbohydrates actually do physiologically
Why the “carbs make you fat” model is incomplete
How glycogen storage truly limits performance
The difference between sedentary carb exposure and athletic demand
How carbohydrates interact with VO₂ max and lactate threshold
What happens when you chronically under-fuel
How to periodise carbohydrate intake intelligently
How to use carbohydrates without compromising metabolic health
If you’ve reduced carbs and felt flatter, slower, or unable to push intensity — this is why.
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