Effects of preexercise snack feeding on endurance cycle exercise.
Effects of preexercise snack feeding on endurance cycle exercise.
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运动前零食喂养对耐力周期运动的影响。
DOI：
10.1152/jappl.1986.60.3.980
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发表时间：
1986
期刊：
影响因子：
--
通讯作者：
Horton,ES
中科院分区：
文献类型：
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作者：
Devlin,JT;Calles-Escandon,J;Horton,ES
我们研究了8名健康男性在间歇性循环运动前30分钟摄入零食（S）（260千卡）或安慰剂（P）对耐力表现和肌糖原消耗的影响。运动前即刻，血糖（PG）显著增加，（S +28 +/- 9.7; P +0.1 +/- 0.8 mg/dl）和胰岛素（S +219 +/- 61.5; P-7 +/- 5.5 pmol/l）（P小于0.05）以下S喂养与P相比，这些差异不再存在的第一个运动期结束。两组之间的耐力时间（S 52 +/- 6.4; P 48 +/- 5.6 min）或运动后肌糖原消耗程度（S 56 +/- 14.7; P 50 +/- 15.5微克/毫克蛋白）没有差异。PG维持在基线（进食前）浓度后S，而有一种趋势，PG稳定下降后，P。运动期间氧化的碳水化合物的总克数两组之间没有差异（S 120; P 118克）。这些结果表明，运动前30分钟摄入混合大量营养素零食不会损害耐力表现，也不会增加未经训练的成年男性受试者在高强度周期运动期间肌糖原消耗的程度。
We studied the effects of ingesting either a snack food (S) (260 kcal) or placebo (P) 30 min before intermittent cycle exercise at 70% maximal O2 consumption on endurance performance and muscle glycogen depletion in eight healthy human males. Immediately before exercise there were significantly greater increases in plasma glucose (PG) (S +28 +/- 9.7; P +0.1 +/- 0.8 mg/dl) and insulin (S +219 +/- 61.5; P -7 +/- 5.5 pmol/l) (P less than 0.05) following S feeding compared with P. These differences were no longer present by the end of the first exercise period. There were no differences in endurance times (S 52 +/- 6.4; P 48 +/- 5.6 min) or in the extent of muscle glycogen depletion following exercise (S 56 +/- 14.7; P 50 +/- 15.5 micrograms/mg protein) between the two groups. PG was maintained at base-line (prefeeding) concentrations following S, whereas there was a tendency for PG to steadily decrease after P. Total grams of carbohydrate oxidized during exercise did not differ between the two groups (S 120; P 118 g). These results demonstrate that the ingestion of a mixed-macronutrient snack 30 min before exercise does not impair endurance performance nor increase the extent of muscle glycogen depletion during high-intensity cycle exercise in untrained adult male subjects.