低能量的可用性,然后是最佳能量的可用性,对训练有素的女性的表现没有好处
Mikkel Oxfeldt1, Daniel Marsi1, Peter M Christensen2
1Department of Public Health, Aarhus University, Aarhus C, DENMARK.
Medicine and science in sports and exercise
|January 5, 2024
概括
在训练有素的雌性中,短时间的低能量可用性 (LEA) 损害了身体表现,并减少了肌肉糖原. 虽然两天的最佳能源可用性 (OEA) 有助于恢复,但与持续的OEA相比,性能仍然不理想.
科学领域:
- 体育科学 运动科学 运动科学
- 运动生理学 运动生理学
- 营养生物化学 营养生物化学
背景情况:
- 运动员经常使用短期低能量的可用性 (LEA) 来减少体重,并可能提高表现.
- 在LEA之后的恢复对身体表现和生理标志物的影响需要进一步研究.
研究的目的:
- 研究10天LEA干预后2天最佳能量可用性 (OEA) 对受过训练的雌性体育表现的影响.
- 评估与性能变化相关的全身和分子水平的生理标记.
主要方法:
- 三十个训练有素的乳女性被随机分为LEA (25 kcal·FFM−1·d−1) 或OEA (50 kcal·FFM−1·d−1) 组,进行10天的监督性炼.
- 干预前后测量了肌肉活检,血液样本,性能测试,身体组成和休息代谢率.
- 一个线性混合模型分析了组和时间效应,对象作为随机效应.
主要成果:
- 与OEA相比,LEA显著降低了体重,肌肉糖原,重复冲刺能力,4分钟计时表现和力量发展速度.
- 经过两天的OEA恢复,部分恢复了计时和冲刺的表现,但仍然低于持续使用OEA的组.
- 当性能正常化为体重时,LEA没有显示任何性能增强.
结论:
- 在受过训练的雌性中,十天的LEA会损害绝对的体力表现,并减少肌肉糖原储存.
- 虽然2天的OEA恢复部分缓解了这些损害,但性能仍然低于持续的OEA.
- 这项研究不支持这样的假设,即LEA诱导的体重减少可以改善功率对质量比,并提高身体表现.
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