NS 132 SQ 14 - Nutrition for Exercise: Study Questions...

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Nutrition for Exercise: Study Questions Synopsis : This lecture takes a deeper look at the physiological effects ō exercise &, the role ō good nutrition in maximizing its benefits. In particular, the role ō CHO is emphasized. Like other topics in this course, we first approach nutrition for exercise conceptually. We then conclude w/ practical, specific actions you can take to put the principles learned into practice. Textbook readings: Chapter 11 I. Activity intensity a. Aerobic b. Anaerobic c. CHO Activity intensity ~ nutritional demands ō exercise Aerobic What defines aerobic conditions? How much oxygen is the circulatory system able to deliver under aerobic conditions? aerobic : condition ō producing energy through processes that require oxygen (O 2 ); having sufficient oxygen to do so - “w/ air” - oxygen demands for energy production : supplied by circulatory sys. What fuels can be used aerobically? The fuels CHO & fat can be used aerobically. Anaerobic What defines anaerobic conditions? Is the circulatory system able to supply adequate oxygen? anaerobic : condition ō producing energy through processes that do not require oxygen (O 2 ); not having sufficient/adequate oxygen to produce energy through other processes - “w/o air” - oxygen demand for energy production : exceeds ability ō circulatory sys. to provide oxygen What fuels can be burned anaerobically? Only CHO can be burned anaerobically. Carbohydrates What is the body’s preferred fuel for exercise? Muscle glycogen is the body’s preferred fuel for exercise. What kind ō exercise duration is particularly dependent on CHO stores? Anaerobic , short duration , & high intensity exercise is particularly dependent on CHO stores. II. CHO storage a. Blood glucose used as the fuel b. Muscle glycogen used only in muscle it is stored in c. Liver glycogen released into blood
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d. CHO absorbed from gut during exercise [Fasting ] CHO storage What are the three sites ō CHO storage? Which are available for systemic use? Which must be used in place? 3 Sites ō CHO Storage : 1) muscle glycogen : released into bloodstream 2) liver glycogen : released into bloodstream to maintain blood glucose 3) blood glucose Liver glycogen & blood glucose are available for systemic use. Muscle glycogen must be used in place. How are liver supplies used during exercise? liver glycogen : released into bloodstream to maintain blood glucose (during exercise) III. Glucose as fuel a. Anaerobic glycolysis b. Aerobic glycolysis ] Glucose as fuel - release solar energy stored in chem. bonds ō glucose molecule - metabolism reverses photosynthesis Anaerobic glycolysis Is oxygen used in this process? No
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This note was uploaded on 03/29/2008 for the course NUTRI SCI 132 taught by Professor Anderson during the Spring '08 term at University of Wisconsin.

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NS 132 SQ 14 - Nutrition for Exercise: Study Questions...

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