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在训练有素的男性三项运动员中,环境热应激抵消与碳水化合物周期化相关的适应
Samuel Bennett1,2, Eve Tiollier2, Elodie Guibert2
1Research Institute for Sport and Exercise Science (RISES), Liverpool John Moores University, Liverpool, UK.
Scandinavian journal of medicine & science in sports
|June 16, 2023
概括
低睡眠低训练 (SL-TL) 饮食策略可以提高脂肪氧化和耐力表现. 然而,将SL-TL与热应激相结合可能会阻碍这些有益的适应,这表明热可能会损害训练改进.
科学领域:
- 运动生理学 运动生理学
- 营养科学 营养科学
- 体育表现 体育表现 体育表现
背景情况:
- 使用低睡眠列车低 (SL-TL) 模型的碳水化合物 (CHO) 摄入周期化可以增加炼期间的脂肪氧化,并改善耐力适应.
- 环境热应激通常会增加运动期间的CHO氧化.
- 对于SL-TL和热应激对代谢和性能结果的综合影响尚不清楚.
研究的目的:
- 调查SL-TL饮食运动模型与环境热应激相结合对耐力训练的男性的影响.
- 为了确定SL-TL单独或与热应激相结合是否会增强脂肪氧化和循环性能.
- 为了比较SL-TL在温带和热带条件下对代谢和性能适应的影响.
主要方法:
- 23名经受耐力训练的雄性被分为三个组:控制 (CON),在温带条件下的SL-TL (SLTemp) 和在热应激条件下的SL-TL (SLHeat).
- 所有组都接受了相同的2周的自行车训练干预,每天的CHO总摄入量相匹配 (6g·kg-1·day-1),但SL组操纵了CHO的可用性.
- SLTemp和CON在20°C进行训练,而SLHeat在35°C进行训练. 亚最大基质利用率和30分钟骑自行车的表现被评估为干预前,干预后和干预后1周.
主要成果:
- 与CON组相比,SLTemp组在干预后显著改善了脂肪氧化率.
- 与SLTemp组相比,SLHeat组的脂肪氧化率明显较低,无论是在干预后立即还是一周后.
- 在干预后温带条件下,SLTemp组的骑自行车表现有所改善,但在炎热条件下的组之间没有观察到表现差异.
结论:
- 当SL-TL饮食-运动模型在没有额外的热应激的情况下实施时,它有效地增强了代谢适应,并提高了耐力表现.
- 将SL-TL与环境热应激相结合,似乎可以减轻与SL-TL策略通常相关的积极代谢和性能适应.
- 环境热压力可能会抵消碳水化合物周期化策略的好处,例如耐力运动员的SL-TL.
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