两种不同剂量碳水化合物摄入对跆拳道模拟比赛相关表现的影响。
Effects of two different doses of carbohydrate ingestion on taekwondo-related performance during a simulated tournament.
机构信息
Department of Sport Physiology, Boroujerd Branch, Islamic Azad University, Boroujerd, Iran.
Department of Sport Science, Imam Khomeini International University, Qazvin, Iran.
出版信息
J Int Soc Sports Nutr. 2021 May 27;18(1):40. doi: 10.1186/s12970-021-00434-4.
BACKGROUND
Carbohydrate (CHO) ingestion enhances exercise performance; however, the efficacy of CHO intake on repeated bouts of exercise simulating a taekwondo tournament is unknown. Therefore, the purpose was to compare the effects of two different doses of CHO on a sports-specific kicking test during a simulated taekwondo tournament compared to placebo (PLA).
METHODS
In a double-blind, randomized-placebo controlled, cross-over trial, eleven junior male professional taekwondo athletes (age: 16 ± 0.8 years, body mass: 55.3 ± 7.3 kg) ingested one of three solutions: (i) high dose (C45): 45 g of CHO (60 g∙h), (ii) low dose (C22.5): 22.5 g of CHO (30 g∙h; both solutions containing 2:1 glucose:fructose), or a PLA immediately following each kicking test. The kicking test was repeated 5 times, separated by 45 mins of rest, simulating a typical taekwondo competition day. Ratings of perceived exertion (RPE) and gastrointestinal discomfort (GI) scores were collected immediately after, and blood glucose before each test.
RESULTS
The results revealed that C45 and C22.5 did not improve total, successful, or percentage of successful kicks compared to PLA (p > 0.05). Blood glucose was significantly higher following both CHO conditions compared with PLA across all five tests (p < 0.05). There were no differences between treatments or across tests for RPE (p > 0.05).
CONCLUSION
CHO intake, independent of the dose, did not alter taekwondo kick performance during a simulated taekwondo tournament.
背景
碳水化合物（CHO）的摄入可以提高运动表现；然而，CHO 摄入对模拟跆拳道锦标赛的多次运动的效果尚不清楚。因此，本研究的目的是比较两种不同剂量的 CHO 对模拟跆拳道锦标赛中特定于运动的踢腿测试的影响，与安慰剂（PLA）相比。
方法
在一项双盲、随机、安慰剂对照、交叉试验中，11 名初级男性职业跆拳道运动员（年龄：16±0.8 岁，体重：55.3±7.3kg）摄入以下三种溶液之一：（i）高剂量（C45）：45gCHO（60g·h），（ii）低剂量（C22.5）：22.5gCHO（30g·h；两种溶液均含有 2:1 的葡萄糖：果糖），或在每次踢腿测试后立即服用 PLA。踢腿测试重复 5 次，每次间隔 45 分钟休息，模拟典型的跆拳道比赛日。在每次测试前后立即收集感觉用力程度（RPE）和胃肠道不适（GI）评分。
结果
结果表明，与 PLA 相比，C45 和 C22.5 并没有提高总踢、成功踢或成功踢百分比（p>0.05）。与 PLA 相比，在所有五次测试中，CHO 条件下的血糖均显著升高（p<0.05）。在 RPE 方面，治疗之间或测试之间没有差异（p>0.05）。
结论
CHO 的摄入，无论剂量如何，都不会改变模拟跆拳道锦标赛中跆拳道踢腿的表现。
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