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Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise
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| Zeitschriftentitel: | American Journal of Physiology-Cell Physiology |
|---|---|
| Personen und Körperschaften: | , , |
| In: | American Journal of Physiology-Cell Physiology, 261, 1991, 1, S. C71-C76 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Physiological Society
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| Schlagwörter: |
| author_facet |
Spencer, M. K. Yan, Z. Katz, A. Spencer, M. K. Yan, Z. Katz, A. |
|---|---|
| author |
Spencer, M. K. Yan, Z. Katz, A. |
| spellingShingle |
Spencer, M. K. Yan, Z. Katz, A. American Journal of Physiology-Cell Physiology Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise Cell Biology Physiology |
| author_sort |
spencer, m. k. |
| spelling |
Spencer, M. K. Yan, Z. Katz, A. 0363-6143 1522-1563 American Physiological Society Cell Biology Physiology http://dx.doi.org/10.1152/ajpcell.1991.261.1.c71 <jats:p>The effect of carbohydrate (CHO) ingestion on metabolic responses to exercise has been investigated. Subjects cycled at approximately 70% of maximal oxygen uptake to fatigue [135 +/- 17 (+/- SE) min] on the first occasion (control, CON) and at the same work load and duration on the second occasion but with addition of ingestion of CHO during the exercise. Biopsies were taken from the quadriceps femoris muscle before and after exercise. The sum of the hexose monophosphates (HMP), as well as lactate and alanine, in muscle was higher after CHO exercise (P less than or equal to 0.05, P less than or equal to 0.05, and P less than or equal to 0.01, respectively). Acetylcarnitine increased during exercise but was not significantly different between treatments after exercise (CON, 6.6 +/- 1.7; CHO, 10.0 +/- 1.2 mmol/kg dry wt; P = NS). The sum of the tricarboxylic acid cycle intermediates (TCAI; citrate + malate + fumarate) was increased during exercise and was higher after CHO exercise (2.34 +/- 0.32 vs. 1.68 +/- 0.17 mmol/kg dry wt; P less than or equal to 0.05). IMP was less than 0.1 mmol/kg dry wt at rest and increased to 0.77 +/- 0.26 (CON) and 0.29 +/- 0.11 mmol/kg dry wt (CHO) (P less than or equal to 0.05) during exercise. It was recently found that during prolonged exercise there is initially a rapid and large expansion of TCAI and glycogenolytic intermediates in human muscle followed by a continuous decline in TCAI and glycogenolytic intermediates [K. Sahlin, A. Katz, and S. Broberg. Am. J. Physiol. 259 (Cell Physiol. 28): C834-C841, 1990].(ABSTRACT TRUNCATED AT 250 WORDS)</jats:p> Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise American Journal of Physiology-Cell Physiology |
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American Journal of Physiology-Cell Physiology |
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49 |
| title |
Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise |
| title_unstemmed |
Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise |
| title_full |
Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise |
| title_fullStr |
Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise |
| title_full_unstemmed |
Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise |
| title_short |
Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise |
| title_sort |
carbohydrate supplementation attenuates imp accumulation in human muscle during prolonged exercise |
| topic |
Cell Biology Physiology |
| url |
http://dx.doi.org/10.1152/ajpcell.1991.261.1.c71 |
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1991 |
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C71-C76 |
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<jats:p>The effect of carbohydrate (CHO) ingestion on metabolic responses to exercise has been investigated. Subjects cycled at approximately 70% of maximal oxygen uptake to fatigue [135 +/- 17 (+/- SE) min] on the first occasion (control, CON) and at the same work load and duration on the second occasion but with addition of ingestion of CHO during the exercise. Biopsies were taken from the quadriceps femoris muscle before and after exercise. The sum of the hexose monophosphates (HMP), as well as lactate and alanine, in muscle was higher after CHO exercise (P less than or equal to 0.05, P less than or equal to 0.05, and P less than or equal to 0.01, respectively). Acetylcarnitine increased during exercise but was not significantly different between treatments after exercise (CON, 6.6 +/- 1.7; CHO, 10.0 +/- 1.2 mmol/kg dry wt; P = NS). The sum of the tricarboxylic acid cycle intermediates (TCAI; citrate + malate + fumarate) was increased during exercise and was higher after CHO exercise (2.34 +/- 0.32 vs. 1.68 +/- 0.17 mmol/kg dry wt; P less than or equal to 0.05). IMP was less than 0.1 mmol/kg dry wt at rest and increased to 0.77 +/- 0.26 (CON) and 0.29 +/- 0.11 mmol/kg dry wt (CHO) (P less than or equal to 0.05) during exercise. It was recently found that during prolonged exercise there is initially a rapid and large expansion of TCAI and glycogenolytic intermediates in human muscle followed by a continuous decline in TCAI and glycogenolytic intermediates [K. Sahlin, A. Katz, and S. Broberg. Am. J. Physiol. 259 (Cell Physiol. 28): C834-C841, 1990].(ABSTRACT TRUNCATED AT 250 WORDS)</jats:p> |
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| description | <jats:p>The effect of carbohydrate (CHO) ingestion on metabolic responses to exercise has been investigated. Subjects cycled at approximately 70% of maximal oxygen uptake to fatigue [135 +/- 17 (+/- SE) min] on the first occasion (control, CON) and at the same work load and duration on the second occasion but with addition of ingestion of CHO during the exercise. Biopsies were taken from the quadriceps femoris muscle before and after exercise. The sum of the hexose monophosphates (HMP), as well as lactate and alanine, in muscle was higher after CHO exercise (P less than or equal to 0.05, P less than or equal to 0.05, and P less than or equal to 0.01, respectively). Acetylcarnitine increased during exercise but was not significantly different between treatments after exercise (CON, 6.6 +/- 1.7; CHO, 10.0 +/- 1.2 mmol/kg dry wt; P = NS). The sum of the tricarboxylic acid cycle intermediates (TCAI; citrate + malate + fumarate) was increased during exercise and was higher after CHO exercise (2.34 +/- 0.32 vs. 1.68 +/- 0.17 mmol/kg dry wt; P less than or equal to 0.05). IMP was less than 0.1 mmol/kg dry wt at rest and increased to 0.77 +/- 0.26 (CON) and 0.29 +/- 0.11 mmol/kg dry wt (CHO) (P less than or equal to 0.05) during exercise. It was recently found that during prolonged exercise there is initially a rapid and large expansion of TCAI and glycogenolytic intermediates in human muscle followed by a continuous decline in TCAI and glycogenolytic intermediates [K. Sahlin, A. Katz, and S. Broberg. Am. J. Physiol. 259 (Cell Physiol. 28): C834-C841, 1990].(ABSTRACT TRUNCATED AT 250 WORDS)</jats:p> |
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| spelling | Spencer, M. K. Yan, Z. Katz, A. 0363-6143 1522-1563 American Physiological Society Cell Biology Physiology http://dx.doi.org/10.1152/ajpcell.1991.261.1.c71 <jats:p>The effect of carbohydrate (CHO) ingestion on metabolic responses to exercise has been investigated. Subjects cycled at approximately 70% of maximal oxygen uptake to fatigue [135 +/- 17 (+/- SE) min] on the first occasion (control, CON) and at the same work load and duration on the second occasion but with addition of ingestion of CHO during the exercise. Biopsies were taken from the quadriceps femoris muscle before and after exercise. The sum of the hexose monophosphates (HMP), as well as lactate and alanine, in muscle was higher after CHO exercise (P less than or equal to 0.05, P less than or equal to 0.05, and P less than or equal to 0.01, respectively). Acetylcarnitine increased during exercise but was not significantly different between treatments after exercise (CON, 6.6 +/- 1.7; CHO, 10.0 +/- 1.2 mmol/kg dry wt; P = NS). The sum of the tricarboxylic acid cycle intermediates (TCAI; citrate + malate + fumarate) was increased during exercise and was higher after CHO exercise (2.34 +/- 0.32 vs. 1.68 +/- 0.17 mmol/kg dry wt; P less than or equal to 0.05). IMP was less than 0.1 mmol/kg dry wt at rest and increased to 0.77 +/- 0.26 (CON) and 0.29 +/- 0.11 mmol/kg dry wt (CHO) (P less than or equal to 0.05) during exercise. It was recently found that during prolonged exercise there is initially a rapid and large expansion of TCAI and glycogenolytic intermediates in human muscle followed by a continuous decline in TCAI and glycogenolytic intermediates [K. Sahlin, A. Katz, and S. Broberg. Am. J. Physiol. 259 (Cell Physiol. 28): C834-C841, 1990].(ABSTRACT TRUNCATED AT 250 WORDS)</jats:p> Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise American Journal of Physiology-Cell Physiology |
| spellingShingle | Spencer, M. K., Yan, Z., Katz, A., American Journal of Physiology-Cell Physiology, Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise, Cell Biology, Physiology |
| title | Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise |
| title_full | Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise |
| title_fullStr | Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise |
| title_full_unstemmed | Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise |
| title_short | Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise |
| title_sort | carbohydrate supplementation attenuates imp accumulation in human muscle during prolonged exercise |
| title_unstemmed | Carbohydrate supplementation attenuates IMP accumulation in human muscle during prolonged exercise |
| topic | Cell Biology, Physiology |
| url | http://dx.doi.org/10.1152/ajpcell.1991.261.1.c71 |