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Lecture 13 - Kin 110Lecture 13 February 26th 2010 About 300...

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Kin 110—Lecture 13 February 26 th , 2010 About 300 grams stored in muscle 70 grams stored in liver After long and hard exercise, both can be close to empty very quickly. One session of a two hour run it can use it all up, and it takes about 24 hrs to re- energize. 1. What is the “critical window” for glycogen storage (repletion)? Replenish glycogen storage to allow recovery for next bout of exercise. “Critical Window” when the enzyme glycogen synthase (synthesis of glycogen) is most active 2. Why is more glycogen stored if carbohydrates are eaten within this window? Glycogen synthase is most active for about 2 hours after exercise. Consuming CHO in the first 2 hours after exercise can optimize storage of muscle glycogen. 3. Does the form of the carbohydrate matter in terms of its impact on glycogen repletion? What kinds of carbohydrates work best? CHO with high glycemic index replace muscle glycogen MORE effectively in first 24 hrs after exercise.
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