抵抗训练减少了线粒体适应后续耐力训练在健康的未经训练的男性
Paulo H C Mesquita1, Joshua S Godwin1, Bradley A Ruple1
1School of Kinesiology, Auburn University, Auburn, AL, USA.
The Journal of physiology
|July 20, 2023
概括
在耐力训练之前进行阻力训练并没有提高耐力性能,并且影响了线粒体适应. 之前的力量训练并没有为耐力训练的适应提供额外的好处.
科学领域:
- 运动生理学 运动生理学
- 分子生物学分子生物学
- 运动科学 运动科学 运动科学
背景情况:
- 耐力训练 (RT) 被认为可以增强力量和身体构成.
- 它在提高耐力表现和分子适应方面的作用不太清楚.
- 关于并发训练的先前研究表明,关于线粒体适应的结果各不相同.
研究的目的:
- 为了研究前一个阻力训练期间对后来的耐力训练适应的影响.
- 检查对性能指标和骨肌肉分子变化的影响.
- 为了比较一组顺序进行抵抗和耐力训练 (RT+ET) 和一组仅耐力训练 (ET) 之间的适应.
主要方法:
- 25名年轻成年人被分为RT+ET和ET专用组.
- RT+ET组完成了7周的RT,然后是7周的ET.
- 肌肉活检分析了纤维横截面积,核细胞含量,线粒体含量和特定蛋白质标记物,使用免疫组织化学和西方斑点. 此外,还评估了耐力表现和身体成分.
主要成果:
- 抵抗训练改善了身体组成,力量和肌肉纤维特征.
- 两组在耐力训练阶段后,身体脂肪百分比和耐力表现均有相似的改善.
- 然而,RT+ET组的线粒体复合物水平显著增加,相对于仅ET组的线粒体含量相比,相对线粒体含量减少.
结论:
- 在耐力训练之前进行阻力训练不会提高随后的耐力性能.
- 在抵抗训练之前,似乎会损害对耐力训练的预期线粒体适应.
- 这些发现表明,训练模式的顺序对于优化生理适应至关重要.
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