没有改变的最大功率和次最大性能与男性骑自行车者在逐渐缩小时的氧化性vastus lateralis蛋白质组表型相关
Pieter de Lange1, Giuseppe Petito1, Hannah L Notbohm2
1Department of Environmental, Biological, and Pharmaceutical Sciences and Technologies, University of Campania "Luigi Vanvitelli", Caserta, Italy.
Physiological reports
|April 23, 2025
概括
在两周内将训练量减少50%可以改善骑自行车运动员的肌肉氧化代谢. 这种短期的训练减少并没有对功率输出或最大氧气吸收产生负面影响.
科学领域:
- 运动生理学 运动生理学
- 运动科学 运动科学 运动科学
- 肌肉生物学 肌肉生物学
背景情况:
- 了解减少训练量 (渐进) 对运动员生理和分子适应的影响,对于优化表现至关重要.
- 关于短期训练量减少如何影响骑自行车运动员的肌肉蛋白质和生理参数的研究有限.
研究的目的:
- 为了研究50%减少训练量对男性骑自行车运动员巨大的横向肌肉蛋白质和生理参数的影响.
- 为了确定短期的逐渐缩减是否会影响功率输出,最大氧气吸收,乳酸值和肌肉纤维组成.
主要方法:
- 15名男性骑自行车者接受了为期9周的训练计划,随后进行了为期2周的干预期.
- 对照组保持了训练量,而渐变组则减少了50%的训练量.
- 肌肉活检分析了蛋白质配置和纤维类型比率;测量了包括峰值功率输出,最大氧气吸收和乳酸值在内的生理参数.
主要成果:
- 两组之间在峰值功率输出,最大氧气吸收或冲刺表现方面没有发现显著差异.
- 逐渐缩小的组显示肌肉蛋白与线粒体有氧呼吸相关的增加和参与翻译和actin组织的蛋白质的减少.
- 虽然对照组在两种乳酸值 (LT1和LT2) 上都提高了功率,但逐渐缩小的组保持了干预前的水平.
结论:
- 暂时减少50%的训练量可能会增强骨肌肉中的氧化代谢.
- 连接两周可以在不损害或可能改善骑自行车者的关键生理标记的情况下实施.
- 这些发现表明,战略性的短期减轻训练负载可能对耐力运动员有益.
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