During high-intensity exercise,from where do muscles primarily get their energy?

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During high-intensity exercise, muscles primarily get their energy from carbohydrates, as they are broken down into glucose, which can be used for energy. This is why athletes often consume high-carbohydrate diets in order to provide adequate fuel for their intense workouts. Protein and fat can also be used for energy, but not as efficiently as carbohydrates, and vitamins do not provide energy directly to the muscles.

During High-Intensity Exercise,from Where Do Muscles Primarily Get Their Energy