Pre-exercise carbohydrate feedings and muscle glycogen utilization during treadmill running in trained runners
Six runners (V02 max=68.2 ± 3.4 ml/kg/min) were studied on three separate occasions during a 30 min treadmill run at 70% V02 max. On each occasion, the subjects ingested either 75g of glucose (trial G), fructose (trial F) or a sweetened placebo (trial C). No differences were observed between any of...
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ndltd-BSU-oai-cardinalscholar.bsu.edu-handle-1830972014-07-22T03:32:33ZPre-exercise carbohydrate feedings and muscle glycogen utilization during treadmill running in trained runnersFielding, Roger A.Running -- Physiological aspects.Exercise -- Physiological aspects.Carbohydrates -- Metabolism.Six runners (V02 max=68.2 ± 3.4 ml/kg/min) were studied on three separate occasions during a 30 min treadmill run at 70% V02 max. On each occasion, the subjects ingested either 75g of glucose (trial G), fructose (trial F) or a sweetened placebo (trial C). No differences were observed between any of the trials for oxygen uptake, heart rate or perceived exertion. Serum glucose levels were elevated as a result of the glucose feeding (P<0.05) reaching peak levels at 30 min post-feeding. With the onset of exercise, glucose levels dropped to a low of 5.89 ± 0.99 mmol/l at 15 min of exercise in trial G. Serum glucose concentrations in trials F and C averaged 6.21 ± 0.31 mmol/l and 5.95 ± 0.23 mmol/l over all the time points, respectively, and were not different (p>0.05). Muscle glycogen utilization in the first 15 min of exercise was similar in trial C (18.8 ± 1.9 mmol/kg), trial F (16.3 ± 4.1 mmol/kg) and trial G (18.8 ± 9.1 mmol/kg), and total glycogen use was also similar in trial C (20.7 ± 5.3 mmol/kg), trial F (35.4 ±6.3 mmol/kg) and trial G (25.6 ± mmol/kg). These data suggest that pre-exercise feedings of fructose or glucose do not affect the rate of muscle glycogen utilization during 30 min of treadmill running in well-trained runners.Costill, David L.2011-06-03T19:33:59Z2011-06-03T19:33:59Z19851985vii, 37 leaves : ill. ; 28 cm.LD2489.Z72 1985 .F54http://cardinalscholar.bsu.edu/handle/handle/183097http://liblink.bsu.edu/uhtbin/catkey/438361Virtual Press |
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Running -- Physiological aspects. Exercise -- Physiological aspects. Carbohydrates -- Metabolism. |
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Running -- Physiological aspects. Exercise -- Physiological aspects. Carbohydrates -- Metabolism. Fielding, Roger A. Pre-exercise carbohydrate feedings and muscle glycogen utilization during treadmill running in trained runners |
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Six runners (V02 max=68.2 ± 3.4 ml/kg/min) were studied on three separate occasions during a 30 min treadmill run at 70% V02 max. On each occasion, the subjects ingested either 75g of glucose (trial G), fructose (trial F) or a sweetened placebo (trial C). No differences were observed between any of the trials for oxygen uptake, heart rate or perceived exertion. Serum glucose levels were elevated as a result of the glucose feeding (P<0.05) reaching peak levels at 30 min post-feeding. With the onset of exercise, glucose levels dropped to a low of 5.89 ± 0.99 mmol/l at 15 min of exercise in trial G. Serum glucose concentrations in trials F and C averaged 6.21 ± 0.31 mmol/l and 5.95 ± 0.23 mmol/l over all the time points, respectively, and were not different (p>0.05). Muscle glycogen utilization in the first 15 min of exercise was similar in trial C (18.8 ± 1.9 mmol/kg), trial F (16.3 ± 4.1 mmol/kg) and trial G (18.8 ± 9.1 mmol/kg), and total glycogen use was also similar in trial C (20.7 ± 5.3 mmol/kg), trial F (35.4 ±6.3 mmol/kg) and trial G (25.6 ± mmol/kg). These data suggest that pre-exercise feedings of fructose or glucose do not affect the rate of muscle glycogen utilization during 30 min of treadmill running in well-trained runners. |
author2 |
Costill, David L. |
author_facet |
Costill, David L. Fielding, Roger A. |
author |
Fielding, Roger A. |
author_sort |
Fielding, Roger A. |
title |
Pre-exercise carbohydrate feedings and muscle glycogen utilization during treadmill running in trained runners |
title_short |
Pre-exercise carbohydrate feedings and muscle glycogen utilization during treadmill running in trained runners |
title_full |
Pre-exercise carbohydrate feedings and muscle glycogen utilization during treadmill running in trained runners |
title_fullStr |
Pre-exercise carbohydrate feedings and muscle glycogen utilization during treadmill running in trained runners |
title_full_unstemmed |
Pre-exercise carbohydrate feedings and muscle glycogen utilization during treadmill running in trained runners |
title_sort |
pre-exercise carbohydrate feedings and muscle glycogen utilization during treadmill running in trained runners |
publishDate |
2011 |
url |
http://cardinalscholar.bsu.edu/handle/handle/183097 http://liblink.bsu.edu/uhtbin/catkey/438361 |
work_keys_str_mv |
AT fieldingrogera preexercisecarbohydratefeedingsandmuscleglycogenutilizationduringtreadmillrunningintrainedrunners |
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1716708391049494528 |