How does the intensity and duration of exercise affect fat metabolism? What effect would an improved...

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Medical Sciences

How does the intensity and duration of exercise affect fatmetabolism? What effect would an improved aerobic fitness have onfat metabolism during exercise (be specific to how these factorsinfluence how much fat is used)?

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Fatty acids are the most abundant source of endogenous energy substrate They can be mobilized from peripheral adipose tissue and transported via the blood to active muscle During higher intensity exercise triglyceride within the muscle can also be hydrolyzed to release fatty acids for subsequent direct oxidation Control of fatty acid oxidation in exercise can potentially occur via changes in availability or via changes in the ability of the muscle to oxidize fatty acids We have performed a series of experiments to distinguish the relative importance of these potential sites of control The process of lipolysis normally provides free fatty acids FFA at a rate in excess of that required to supply resting energy requirements At See Answer

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