在模拟越野滑雪比赛后,效率下降和技术变化
Heleen Docter1,2, Pim Scheiberlich1, Jørgen Danielsen2
1Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands.
概括
在越野滑雪中,经过模拟比赛后,总效率 (GE) 显著下降. 运动技术的变化无法解释这种效率下降,这表明其他与疲劳相关的因素正在发挥作用.
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:
- 越野滑雪是一项苛刻的耐力运动,需要高水平的生理和生物力学效率.
- 评估总效率 (GE) 和相关动力学变量的变化可以提供有关长时间炼期间性能下降的见解.
研究的目的:
- 为了比较模拟越野滑板滑雪比赛前后的总效率 (GE).
- 为了研究GE变化和赛后动力学变量之间的关系.
主要方法:
- 总效率 (GE) 和3D动力学变量在模拟比赛 (约39分钟) 之前和之后在低极度滚雪滑冰过程中被测量.
- 模拟比赛涉及多种倾斜 (2%至12%) 和标准化速度倾斜协议.
- 使用输出功率和呼吸数据计算了GE.
主要成果:
- 在模拟比赛后,GE显著下降了0.6%的点 (15.6%至15.0%,P <.001).
- 这种下降与增加的循环速率,更大的滑雪边缘/定向角度以及减少的推开速度和地面接触时间 (P < .05) 相关.
- 动力学变量变化与GE变化 (P > .05) 之间没有发现显著的关联.
结论:
- 在滑板式越野滑雪比赛中,在波浪地形上模拟比赛后,总效率会恶化.
- 尽管观察到动力学变量的变化,但这些变化与GE的减少没有相关,这表明可能涉及其他疲劳机制.
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