远距离跑步者在乳酸值周围的强度的步骤到步骤的变化和波动
Takuya Watanabe1, Shuichi Kondo1, Katsuyuki Kakinoki2
1Department of Sports Sciences, The University of Tokyo, Meguro, Tokyo, Japan.
Heliyon
|July 10, 2023
概括
研究人员探索了步伐变化与跑步者的乳酸值 (LT) 之间的关系. 步行波动在LT附近发生了变化,这表明运动控制发生了变化,远程相关性可能有助于非侵入性地检测LT.
科学领域:
- 运动科学 运动科学 运动科学
- 生物力学 生物力学
- 运动生理学 运动生理学
背景情况:
- 脚步变化与跑步疲劳和受伤有关.
- 乳酸值 (LT) 是长跑运动员的一个关键性能指标.
- 跑步步态度变化和LT之间的关系仍然没有被研究.
研究的目的:
- 为了研究乳酸值 (LT) 和训练有素的中长距离跑步者的步步变化之间的关联.
- 为了确定步态参数是否会随着运动强度的增加而变化,相对于 LT.
- 探索步态分析用于非侵入性LT检测的潜力.
主要方法:
- 33名训练有素的跑步者用他们的鞋子上的加速度计进行了分级的运动测试.
- 乳酸值 (LT) 通过测量血液中的乳酸度来确定.
- 分析了步行时间 (ST),地面接触时间 (CT),峰值加速度 (PA) 和它们的变化 (CV,α).
主要成果:
- 在地面接触时间 (CT) 和峰值加速度 (PA) 的可变性 (CV) 和远程相关性 (α) 中观察到明显的强度依赖变化.
- 步行时间 (ST) 的变化和相关性没有显著变化,可能是由于能源成本最小化.
- 显示强度依赖变化的步行参数在LT附近下降,表明在高生理负荷下改变了运动控制.
结论:
- 跑步步态度的变化,特别是CT和PA,受运动强度与乳酸值 (LT) 相对的影响.
- 在LT附近的步态参数的变化表明,由于生理需求增加,运动控制策略的转变.
- 步态参数的长距离相关性 (α) 显示出在跑步者中进行非侵入性乳酸值 (LT) 检测的前景.
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