Exercise Physiology | Variation of Fuel Source with Exercise Intensity

The video explores how fuel selection changes with exercise intensity, focusing on the shift in energy source contribution from fat to carbohydrates as intensity increases. It explains absolute and relative energy expenditure, highlighting that higher exercise intensities require more energy, primarily from carbohydrates due to their efficient metabolism. The video concludes with a summary of these concepts, preparing viewers for a follow-up discussion on fuel selection variation with exercise duration.

What happens to the fuel source as exercise intensity increases?

Explain the difference between absolute energy expenditure and relative energy expenditure.

What are the four main sources of energy during exercise?

Describe the role of muscle glycogen and plasma glucose at different exercise intensities.

How does the contribution of carbohydrates and fats change as exercise intensity increases?

What is the significance of the graph showing percent energy from fat and carbohydrates?

Why is carbohydrate considered a more efficient energy source than fat during high-intensity exercise?