SPORTS SCIENCE ESSAY
Glycogen Re-Synthesis After Exercise
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written to a degree level
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3277 words and 11 pages in length
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fully harvard referenced
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Ingestion of carbohydrates following exercise is associated with a series of metabolic events which result in re-synthesis of glycogen in skeletal muscle. In contrast to the rapid depletion of stored carbohydrates which takes place in skeletal muscle during brief bouts of heavy or prolonged exercise, the complete restoration of muscle glycogen to pre-exercise levels in glycogen depleted muscle may require up to several days. However, the level of glycogen repletion achieved during recovery from exercise frequently equals or exceeds the pre-exercise level.
The ability to restore muscle glycogen depends on a number of factors, including the type and quantity of carbohydrate ingested following exercise. In addition, the control of muscle glycogen synthesis involves not just availability of substrates, but synchronous changes in enzyme activities in response to modulation by hormones, principally insulin. In muscle cells, glycogen synthesis takes place via a series of steps beginning with transport of glucose across the muscle cell membrane and activation of hexokinase and glycogen synthase enzyme activity, which permits glucose uptake and deposition...
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