EFFECT OF CARBOHYDRATE-COMPOSITION ON FLUID BALANCE, GASTRIC-EMPTYING, AND EXERCISE PERFORMANCE

被引:12
作者
COLE, KJ
GRANDJEAN, PW
SOBSZAK, RJ
MITCHELL, JB
机构
[1] Human Perforamnce Laboratory, Ball State University, Muncie, 47306., IN
来源
INTERNATIONAL JOURNAL OF SPORT NUTRITION | 1993年 / 3卷 / 04期
关键词
PLASMA VOLUME; BLOOD GLUCOSE; FLUID REPLACEMENT;
D O I
10.1123/ijsn.3.4.408
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
This study examined the effects of serial feedings of different carbohydrate (CHO) solutions on plasma volume, gastric emptying (GE), and performance during prolonged cycling exercise. Solutions containing 6 g% glucose-sucrose (CHO-6GS), 8.3 g% high fructose com syrup (CHO-8HF), 6.3 g% high fructose corn syrup + 2 g% glucose polymer (CHO-8HP), and a water placebo (WP) were compared. Ten trained male cyclists performed four cycling trials consisting of 105 min at 70% VO2max followed by a 15-min all-out, self-paced performance ride. Every 15 min the men consumed one of the four test solutions. Blood samples were taken before, during, and after exercise to determine blood glucose and plasma volume changes. There were no significant differences in performance, GE, or plasma volume changes between trials. Blood glucose was significantly elevated at the 105-min timepoint in all CHO trials when compared to WP. The CHO-8HF and CHO-7HP drinks resulted in a significantly higher delivery of CHO to the intestine. Higher rates of CHO oxidation during the steady-state ride were observed only with the CHO-6GS drink.
引用
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页码:408 / 417
页数:10
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