Lamax:在全力以赴的冲刺周期人体工程学过程中确定最大乳酸形成率的最佳测试持续时间
J O Langley1, S C Ng2, E E Todd2
1Department of Higher Education Sport, Loughborough College, Radmoor Road, Loughborough, Leicestershire, LE11 3BT, UK. Jamie.langley@loucoll.ac.uk.
European journal of applied physiology
|March 30, 2024
概括
10秒的冲刺测试引起了最高的最大乳酸形成率 (La_max),血乳酸峰值发生在运动后5分钟. 这种持续时间最大限度地降低了强度循环运动期间氧化代谢的影响.
科学领域:
- 运动生理学 运动生理学
- 体育科学 运动科学 运动科学
- 人类表现的人类表现.
背景情况:
- 了解最大乳酸积累率 (La_max) 对于优化高强度运动方案至关重要.
- 以前的研究还没有确定在短时间的自行车冲刺中引起La_max峰值的最佳持续时间.
- 研究能量贡献和血液乳酸动力学对于解释性能至关重要.
研究的目的:
- 为了确定在训练有素的雄性中获得最高最大乳酸盐形成率 (La_max) 的最佳测试持续时间.
- 在不同的冲刺时间内探索潜在的生物能贡献 (基,糖分,氧化).
- 为了确定最佳的血液乳酸采样时间,以达到最大努力后的峰值度.
主要方法:
- 15名训练有素的男性完成了三个随机的,全力以赴的10秒,15秒和30秒的冲刺自行车测试.
- 测量包括峰值和平均输出功率,氧气吸收和血液中乳酸盐度.
- 计算了最大的乳酸形成率 (La_max) 和能量贡献.
主要成果:
- 与15秒和30秒的持续时间相比,10秒的冲刺持续时间导致La_max显著更高 (p < 0.001).
- 10秒后,81%的脂蛋白和53%的糖解工作已经完成.
- 在10秒的测试中,在5±2分钟后观察到血中乳酸盐度的峰值 (BLa_maxpost).
结论:
- 一个10秒的全力循环测试是最佳的,以获得最高的最大乳酸形成率 (La_max).
- 10秒的持续时间将氧化代谢的影响降到最低,重点关注无氧能量系统.
- 在10秒的冲刺中,测量运动后血乳酸峰值的最佳时间是5分钟.
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