Effect of the Glycemic Index of Meals on Physical Exercise: A Case Report

IF 1.2 Q3 MULTIDISCIPLINARY SCIENCES
A. Biagini, E. Albi
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引用次数: 0

Abstract

Abstract Carbohydrate uptake before physical exercise allows to maintain plasma glucose concentration. Though, foods or beverages containing the same carbohydrate concentration do not produce the same glycemic and insulin responses which are related to their glycemic index (GI). Last, most studies of CHO loading have been conducted with male subjects, with the assumption that the results also apply to female athletes. Sixteen volunteer amateur athletes, eight men and eight women (age 39.1 ± 7.8 y; VO2max 55,7 ± 11,7 ml/kg/min), were selected and then divided into four groups of four people each one. The trial was divided into several days, one for each group. A carbohydrate source or a placebo (energy 86,5 ± 6,7 kcal; CHO 20,0 g; fat 0,3 ± 0,3 g; protein 0,8 ± 0,8 g) was assigned randomly to each athlete in the group: these supplements differed in the ability to increase blood glucose (banana: high-GI; dried apricots: low-GI; energy gel: mixture of CHO with different blood release), while the placebo was composed of water, sodium cyclamate, sodium saccharin and acesulfame potassium. Three blood samples were taken from each athlete from finger, by glucometer: one before supplementation, one half an hour later – at the start of the run – and one at the end of the exercise. Physical activity consisted of 40 minutes run at medium-high intensity, corresponding to 82% of maximum heart rate or 70% of VO2max. In order to improve the analysis of the results obtained from the detection of biological samples, a questionnaire was submitted to all participants to know their lifestyle and anthropometric and physiological data. Results highlighted a different glycemic response between men and women, suggesting the consumption of low-GI food rather than high-GI before physical exercise in order to keep plasma glucose levels constant.
膳食血糖指数对体育锻炼的影响:1例报告
摘要体育锻炼前摄入碳水化合物可以保持血糖浓度。然而,含有相同碳水化合物浓度的食物或饮料不会产生与血糖指数(GI)相关的相同血糖和胰岛素反应。最后,大多数CHO负荷的研究都是对男性受试者进行的,假设结果也适用于女性运动员。选择16名业余志愿者运动员,8名男性和8名女性(年龄39.1±7.8岁;VO2max 55,7±11,7 ml/kg/min),然后分为四组,每组四人。试验分为几天,每组一天。碳水化合物来源或安慰剂(能量86.5±6,7 kcal;CHO 20.0 g;脂肪0.3±0.3 g;蛋白质0.8±0.8 g)被随机分配给组中的每个运动员:这些补充剂在增加血糖的能力上不同(香蕉:高GI;杏干:低GI;能量凝胶:具有不同血液释放的CHO的混合物),而安慰剂由水、甜蜜素、,糖精钠和安赛蜜钾。通过血糖仪从每位运动员的手指上采集三份血样:一份在补充前,一份在半小时后——跑步开始时——一份在运动结束时。体育活动包括40分钟的中高强度跑步,相当于最大心率的82%或最大VO2max的70%。为了改进对生物样本检测结果的分析,向所有参与者提交了一份问卷,以了解他们的生活方式以及人体测量和生理数据。结果显示,男性和女性的血糖反应不同,这表明为了保持血糖水平不变,在体育锻炼前食用低GI食物而不是高GI食物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
The EuroBiotech Journal
The EuroBiotech Journal Agricultural and Biological Sciences-Food Science
CiteScore
3.60
自引率
0.00%
发文量
17
审稿时长
10 weeks
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