Effects of meals with a different glycemic index on respiratory and biochemical outcomes during endurance exercise

Yi Ting Lin, Chin Fan Lin, Ying Fen Huang, Tzu Shao Yen, Mei Chich Hsu, Jen Fang Liu

研究成果: 雜誌貢獻文章

摘要

The purpose of this study was to compare the effects of a pre-exercise meal containing a different glycemic index on the endurance exercise performance and biochemical outcomes. Twelve healthy volunteers consumed a high glycemic index meal (74, HGI), a low glycemic index meal (32.8, LGI) (each meal provided 1 g carbohydrate/kg body weight), or water (as the control) 1 h before running at 65% VO 2max to exhaustion. After ingesting the meal, blood samples of subjects were drawn from a vein at the baseline, at 15, 30, 45, and 60 min, and at exhaustion. The heart rate, rating perceived exercise (RPE), and respiratory metabolism exchange ratio (RER) were recorded during the exercise. As the data showed, RER values of the LGI and HGI groups were higher than the control before exercise (p <0.05). There were no significant differences among the three groups for heart rate, RPE, and time to exhaustion. Ingestion of the HGI and LGI meals resulted in hyperglycemia during the postprandial period compared to the control (p <0.05). The concentration of plasma free fatty acids (FFAs) in the HGI and LGI groups were significantly lower than in the control (p <0.05). The concentration of FFAs in the LGI group was significantly lower than that in the HGI group. In conclusion, this study demonstrated that an LGI meal might have a positive effect on aerobic endurance through contributing energy by providing carbohydrates as fuel. However, with an HGL meal, one might observe the phenomena of delayed production of factors which cause fatigue, and enhanced endurance exercise performance may be seen with ingestion of an LGI meal before exercise.
原文英語
頁(從 - 到)114-122
頁數9
期刊Nutritional Sciences Journal
34
發行號4
出版狀態已發佈 - 十二月 2009

指紋

Glycemic Index
Meals
Exercise
Nonesterified Fatty Acids
Eating
Heart Rate
Postprandial Period
Carbohydrates
Body Water
Running
Hyperglycemia
Fatigue
Veins
Healthy Volunteers
Body Weight

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

引用此文

Lin, Y. T., Lin, C. F., Huang, Y. F., Yen, T. S., Hsu, M. C., & Liu, J. F. (2009). Effects of meals with a different glycemic index on respiratory and biochemical outcomes during endurance exercise. Nutritional Sciences Journal, 34(4), 114-122.

Effects of meals with a different glycemic index on respiratory and biochemical outcomes during endurance exercise. / Lin, Yi Ting; Lin, Chin Fan; Huang, Ying Fen; Yen, Tzu Shao; Hsu, Mei Chich; Liu, Jen Fang.

於: Nutritional Sciences Journal, 卷 34, 編號 4, 12.2009, p. 114-122.

研究成果: 雜誌貢獻文章

Lin, YT, Lin, CF, Huang, YF, Yen, TS, Hsu, MC & Liu, JF 2009, 'Effects of meals with a different glycemic index on respiratory and biochemical outcomes during endurance exercise', Nutritional Sciences Journal, 卷 34, 編號 4, 頁 114-122.
Lin, Yi Ting ; Lin, Chin Fan ; Huang, Ying Fen ; Yen, Tzu Shao ; Hsu, Mei Chich ; Liu, Jen Fang. / Effects of meals with a different glycemic index on respiratory and biochemical outcomes during endurance exercise. 於: Nutritional Sciences Journal. 2009 ; 卷 34, 編號 4. 頁 114-122.
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