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Which of the following statements regarding carbohydrate and fat metabolism during exercise is true? A: plasma glucose contributes more to energy provision than does muscle glycogen at 85% Vo2 max B: the utilization of fat as an energy source is greatest at the highest exercise intensities e.g. greater than 85% VO2 max C: carbohydrate supplementation during moderately intense exercise (eg. 70-80% VO2 max) can help one to exercise longer until the onset of fatigue D: the greatest amount of glycogen is used at around 65% VO2 max

Which of the following statements regarding carbohydrate and fat metabolism during exercise is true? A: plasma glucose contributes more to energy provision than does muscle glycogen at 85% Vo2 max B: the utilization of fat as an energy source is greatest at the highest exercise intensities e.g. greater than 85% VO2 max C: carbohydrate supplementation during moderately intense exercise (eg. 70-80% VO2 max) can help one to exercise longer until the onset of fatigue D: the greatest amount of glycogen is used at around 65% VO2 max

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question:

Which of the following statements regarding carbohydrate and fat metabolism during exercise is true?

A: plasma glucose contributes more to energy provision than does muscle glycogen at 85% Vo2 max

B: the utilization of fat as an energy source is greatest at the highest exercise intensities e.g. greater than 85% VO2 max

C: carbohydrate supplementation during moderately intense exercise (eg. 70-80% VO2 max) can help one to exercise longer until the onset of fatigue

D: the greatest amount of glycogen is used at around 65% VO2 max

Maintaining Blood Glucose During Exercise ... Benefits of Ingesting Glucose. CARBO PLACEBO FATIGUE 3 -60 30 60 90 120 150 180 200 TIME (min) Subjects cycled at ~70% VO2peak while ingesting either placebo OR 8% CHO beverage. McConell et. al. Journal of Applied Physiology. 87: 1083-1086, 1999. PLASMA GLUCOSE (mmol/I)
Transcribed Image Text:Maintaining Blood Glucose During Exercise ... Benefits of Ingesting Glucose. CARBO PLACEBO FATIGUE 3 -60 30 60 90 120 150 180 200 TIME (min) Subjects cycled at ~70% VO2peak while ingesting either placebo OR 8% CHO beverage. McConell et. al. Journal of Applied Physiology. 87: 1083-1086, 1999. PLASMA GLUCOSE (mmol/I)
Substrate Use During Aerobic Exercise Romijn et al Am J Physiol 265: E380, 1993 Energy expenditure (kJ.kg'.min') Should 65% VO2 max be the target for burning fat and losing weight ??? 1.4 1.2 1.0 0.8 0.6 Muscle glycogen 0.4 I Triglycerides OPlasma FFA 0.2 OPlasma glucose 0.0 25 65 85 % VO2 max VO2 max = maximal oxygen uptake, or maximal aerobic capacity 17
Transcribed Image Text:Substrate Use During Aerobic Exercise Romijn et al Am J Physiol 265: E380, 1993 Energy expenditure (kJ.kg'.min') Should 65% VO2 max be the target for burning fat and losing weight ??? 1.4 1.2 1.0 0.8 0.6 Muscle glycogen 0.4 I Triglycerides OPlasma FFA 0.2 OPlasma glucose 0.0 25 65 85 % VO2 max VO2 max = maximal oxygen uptake, or maximal aerobic capacity 17
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