Abstract
The purpose of this study was to determine the effects of exercise intensity on active and passive intestinal glucose absorption. Eight trained runners (age = 23 ± 2 y; VO2max = 62.1 ± 5.8 mL·kg-1·min-1) performed a 1 h resting experiment and three 1 h treadmill experiments at 30, 50, or 70% VO 2max in a thermoneutral environment. Immediately prior to each experiment, euhydrated subjects ingested a solution containing two non-metabolizable glucose analogs, 3-O-methyl-D-glucose (3MG; actively absorbed; 5 g) and D-xylose (passively absorbed; 5 g). During the following 5 h, all urine was collected and the amount of 3MG and D-xylose in the urine was determined. Using repeated measures ANOVA, a significant (P < 0.05) reduction in urinary excretion of each carbohydrate was observed at 70% VO2max compared to the other intensities suggesting that both active and passive intestinal absorption of glucose may be reduced during prolonged running at this intensity.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 485-493 |
| Number of pages | 9 |
| Journal | International Journal of Sport Nutrition and Exercise Metabolism |
| Volume | 16 |
| Issue number | 5 |
| DOIs | |
| State | Published - Jan 1 2006 |
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All Science Journal Classification (ASJC) codes
- Medicine (miscellaneous)
- Orthopedics and Sports Medicine
- Nutrition and Dietetics
Cite this
Effect of exercise intensity on active and passive glucose absorption. / Lang, James A.; Gisolfi, Carl V.; Lambert, G. Patrick.
In: International Journal of Sport Nutrition and Exercise Metabolism, Vol. 16, No. 5, 01.01.2006, p. 485-493.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of exercise intensity on active and passive glucose absorption
AU - Lang, James A.
AU - Gisolfi, Carl V.
AU - Lambert, G. Patrick
PY - 2006/1/1
Y1 - 2006/1/1
N2 - The purpose of this study was to determine the effects of exercise intensity on active and passive intestinal glucose absorption. Eight trained runners (age = 23 ± 2 y; VO2max = 62.1 ± 5.8 mL·kg-1·min-1) performed a 1 h resting experiment and three 1 h treadmill experiments at 30, 50, or 70% VO 2max in a thermoneutral environment. Immediately prior to each experiment, euhydrated subjects ingested a solution containing two non-metabolizable glucose analogs, 3-O-methyl-D-glucose (3MG; actively absorbed; 5 g) and D-xylose (passively absorbed; 5 g). During the following 5 h, all urine was collected and the amount of 3MG and D-xylose in the urine was determined. Using repeated measures ANOVA, a significant (P < 0.05) reduction in urinary excretion of each carbohydrate was observed at 70% VO2max compared to the other intensities suggesting that both active and passive intestinal absorption of glucose may be reduced during prolonged running at this intensity.
AB - The purpose of this study was to determine the effects of exercise intensity on active and passive intestinal glucose absorption. Eight trained runners (age = 23 ± 2 y; VO2max = 62.1 ± 5.8 mL·kg-1·min-1) performed a 1 h resting experiment and three 1 h treadmill experiments at 30, 50, or 70% VO 2max in a thermoneutral environment. Immediately prior to each experiment, euhydrated subjects ingested a solution containing two non-metabolizable glucose analogs, 3-O-methyl-D-glucose (3MG; actively absorbed; 5 g) and D-xylose (passively absorbed; 5 g). During the following 5 h, all urine was collected and the amount of 3MG and D-xylose in the urine was determined. Using repeated measures ANOVA, a significant (P < 0.05) reduction in urinary excretion of each carbohydrate was observed at 70% VO2max compared to the other intensities suggesting that both active and passive intestinal absorption of glucose may be reduced during prolonged running at this intensity.
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U2 - 10.1123/ijsnem.16.5.485
DO - 10.1123/ijsnem.16.5.485
M3 - Article
C2 - 17240781
AN - SCOPUS:33749476049
VL - 16
SP - 485
EP - 493
JO - International Journal of Sport Nutrition and Exercise Metabolism
JF - International Journal of Sport Nutrition and Exercise Metabolism
SN - 1526-484X
IS - 5
ER -