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An introduction to exercise metabolism 1
Published on September 29, 2021 46 min
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This talk provides an introduction to exercise metabolism. It's about the fuels and the metabolic pathways that supply energy for various sports, and physical activities. My name is Michael Gleeson, and I'm Emeritus Professor of Exercise Biochemistry at Loughborough University. This lecture is going to be divided into two parts. In the first part, I'm going to cover the essential role of adenosine triphosphate (ATP) in supplying energy for all bodily processes, including muscle contraction. We'll cover the main energy pathways through which ATP is resynthesised during exercise, and get an understanding of the important role of phosphocreatine in high-intensity exercise, and the reasons why carbohydrate availability is a limiting factor for endurance performance. Then in the second part of the lecture, we'll look at how different factors influence fuel selection during exercise, with a main focus on the influences of exercise intensity and duration. I'll explain some of the main contributors to fatigue development during both high-intensity exercise, and more prolonged endurance exercise.
After this lecture, you should appreciate the essential role of adenosine triphosphate (ATP) in supplying energy for all bodily processes including muscle contraction, which is obviously what we need to exercise. You should know the main energy pathways through which ATP is resynthesised during exercise, since we don't store very much of it in the muscle. You should understand the important role of phosphocreatine in high-intensity exercise, and understand why carbohydrate availability can be a limiting factor for endurance performance. You'll also hopefully appreciate how exercise intensity and duration influence fuel selection during exercise, the mixture of carbohydrate, and the proportions of those fuels that we use for energy. Finally, understand some of the main contributors to fatigue development during both high-intensity and prolonged endurance exercise.