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During exercise the secretion of glucagon, norepinephrine, and epinephrine increase glycogenolysis and gluconeogenesis (in liver) thus providing more glucose for anaerobic exercise. Cortisol is more involved in gluconeogenesis during sustained bouts of aerobic exercise when carbohydrate resources are depleting.
With sustained exercise the release of cortisol, growth hormone, norepinephrine and epinephrine increase lipase enzyme activity, which increases the oxidation of fatty acids.