Effect of post-exercise caffeine and green coffee bean extract consumption on blood glucose and insulin concentrations

被引:18
作者
Beam, Jason R. [1 ]
Gibson, Ann L. [1 ]
Kerksick, Chad M. [2 ]
Conn, Carole A. [3 ]
White, Ailish C. [1 ]
Mermier, Christine M. [1 ]
机构
[1] Univ New Mexico, Dept Hlth Exercise & Sports Sci, Albuquerque, NM 87131 USA
[2] Lindenwood Univ, Sch Sport Recreat & Exercise Sci, Dept Exercise Sci, St Charles, MO USA
[3] Univ New Mexico, Dept Individual Family & Commun Educ, Albuquerque, NM 87131 USA
关键词
Chlorogenic acid; Oral glucose tolerance test; Cycling; glycogen; Carbohydrate; Insulin sensitivity index; CHLOROGENIC ACID; CARBOHYDRATE; MUSCLE; INGESTION; EXERCISE; RESYNTHESIS; METABOLISM; OVERWEIGHT;
D O I
10.1016/j.nut.2014.07.012
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
Objective: The aim of this study was to investigate the effects of ingesting caffeine and green coffee bean extract on blood glucose and insulin concentrations during a post-exercise oral glucose tolerance test. Methods: Ten male cyclists (age: 26 +/- 5 y; height: 179.9 +/- 5.4 cm; weight: 77.6 +/- 13.3 kg; body mass index: 24 +/- 4.3 kg/m(2); VO2 peak: 55.9 +/- 8.4 mL.kg.min(-1)) participated in this study. In a randomized order, each participant completed three 30-min bouts of cycling at 60% of peak power output. Immediately after exercise, each participant consumed 75 g of dextrose with either 5 mg/kg body weight of caffeine, 10 mg/kg of green coffee bean extract (5 mg/kg chlorogenic acid), or placebo. Venous blood samples were collected immediately before and after exercise during completion of the oral glucose tolerance test. Results: No significant time x treatment effects for blood glucose and insulin were found. Two-h glucose and insulin area under the curve values, respectively, for the caffeine (658 +/- 74 mmol/L and 30,005 +/- 13,304 pmol/L), green coffee bean extract (637 +/- 100 mmol/L and 31,965 +/- 23,586 pmol/L), and placebo (661 +/- 77 mmol/L and 27,020 +/- 12,339 pmol/L) trials were not significantly different (P > 0.05). Conclusion: Caffeine and green coffee bean extract did not significantly alter postexercise blood glucose and insulin concentrations when compared with a placebo. More human research is needed to determine the impact of these combined nutritional treatments and exercise on changes in blood glucose and insulin. (C) 2015 Elsevier Inc. All rights reserved.
引用
收藏
页码:292 / 297
页数:6
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