运动期间外源性葡萄糖氧化与身体大小有积极的关系
Abdullah Ijaz1,2, Adam J Collins1,2, Alfonso Moreno-Cabañas1,2,3
1Centre for Nutrition, Exercise and Metabolism, University of Bath, Bath, United Kingdom.
International journal of sport nutrition and exercise metabolism
|September 27, 2024
概括
较大的运动员在运动期间比较小的运动员氧化更多的外源葡萄糖. 身体大小,而不仅仅是运动强度,可能会影响运动员的碳水化合物摄入建议.
科学领域:
- 运动生理学 运动生理学
- 运动营养 运动营养
- 代谢研究研究 代谢研究
背景情况:
- 关于身体大小如何影响身体活动期间外源性葡萄糖氧化的证据有限.
- 了解基质利用是优化运动表现和加油策略的关键.
研究的目的:
- 为了调查较大的个体在骑自行车运动期间与较小的个体相比,是否会氧化更多的外源葡萄糖.
- 探索体型指标与外源葡萄糖氧化率之间的关系.
主要方法:
- 15名骑自行车的人被分为"小" (<70公斤) 和"大" (>70公斤) 组,根据乳酸值进行匹配.
- 参与者在95%的乳酸值 (相对强度) 或与SMALL组相匹配的绝对强度上骑自行车.
- 所有参与者在试验期间每小时摄入90克13C富含葡萄糖.
主要成果:
- 较大的运动员在相对强度下,与较小的运动员 (33 ± 8 g/hr) 相比,体型较大的运动员表现出显著更高的外源葡萄糖氧化率 (45 ± 13 g/hr).
- 在体型 (质量,身高,身体表面积) 和外源性碳水化合物氧化之间发现了强烈的正相关性.
- 当较大的运动员以与较小运动员相匹配的绝对强度炼时,外源性葡萄糖氧化减少了,但仍然很高.
结论:
- 运动期间外源性葡萄糖氧化能力在体型较大的运动员中平均更大.
- 身体大小似乎是影响运动期间外源葡萄糖代谢的重要因素.
- 需要进一步的研究来确定绝对运动强度或固有的身体尺寸差异是否推动了这些发现,为运动营养指南提供了信息.
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