一个比较力-时间和肌肉激活特征之间的同位素坐和同位素中高拉拉之间的比较
Lachlan P James1, Charlie J Davids, Tomas Rodriguez-Anderson
1Sport, Performance, and Nutrition Research Group, School of Allied Health, Human Services and Sport, La Trobe University, Melbourne, Victoria, Australia.
Journal of strength and conditioning research
|July 11, 2025
概括
在等比式坐和中腿拉动之间,峰值力量是相似的,但早期的力量产生不同. 肌肉激活有所不同,以同度的中腿拉动显示出更大的腿筋参与度,以获得最大的力量.
科学领域:
- 生物力学和运动生理学
- 强度和条件研究研究.
背景情况:
- 了解常见的力量训练练习之间的力量生产和肌肉激活的相似之处和差异对于有效的程序设计至关重要.
- 同位体中腿拉力 (IMTP) 和同位体坐经常用于评估最大力量,但它们的力量-时间和肌肉激活特征尚未完全阐明.
- 电肌图 (EMG) 提供了对抵抗运动期间肌肉招募模式的洞察.
研究的目的:
- 为了比较异面体中腿拉力 (IMTP) 和异面体腰之间的力-时间曲线特征.
- 检查肌肉激活 (EMG) 的大小和时间在IMTP和同位素坐的力-时间曲线上的相应点.
- 为了确定这两个同位体演习之间的这些测量的共同点.
主要方法:
- 15名参与者 (12名男性,3名女性) 进行了IMTP和同位素坐的最大努力试验.
- 同时测量地面反应力和EMG从巨大的中枢 (VM),巨大的侧面 (VL),双腿骨 (BF) 和大背骨 (LD) 收集.
- 计算了共享方差 (r2) 来评估两个练习之间的力-时间特征和EMG的共同性.
主要成果:
- 观察到IMTP和同位平坐之间的净峰值力具有很高的共享差异 (74%),这表明最大强度表达方式类似.
- 在两个测试之间,早期的力-时间特征 (高达200毫秒) 发现较低的共享方差 (27-48%).
- 在各种疾病中发现了平均EMG的显著关系,特别是在IMTP期间,双腿肌 (BF) 的平均肌肉激活显著增加.
结论:
- 虽然峰值力量是IMTP和等比式坐之间最大力量的常见衡量标准,但早期力量的发展有很大的不同.
- 独特的肌肉激活模式,特别是IMTP中增强的腿筋激活 (BF),表明这些练习不能互换来评估力量的各个方面.
- 对于那些旨在强调腿筋对下肢最大力量的贡献的从业者来说,IMTP可能是首选的炼.
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