Q

How does exercise intensity affect the type of fuel your body burns?

From 5 years of verified research · Vassili Sandqvist
A

As exercise intensity increases, the body shifts from burning a higher percentage of fat to utilizing carbohydrates as the dominant fuel source. This phenomenon, known as the crossover concept, means that at lower intensities, fat contributes a greater percentage of energy, but at higher intensities, while fat's percentage contribution decreases, total caloric expenditure increases significantly.

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