相关实验视频

Updated: Jan 23, 2026

Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds

Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds

Published on: August 25, 2020

滑雪运动中的微节奏和性能决定因素:连接速度配置文件,子技术选择和循环特征

Lei Shang¹, Hongjun Yu¹, Ruiying Shi²

¹Division of Sports Science and Physical Education, Tsinghua University, Beijing, China.

BMC sports science, medicine & rehabilitation

|January 22, 2026

概括

更快的越野滑雪运动员通过优化技术和步调,特别是在下坡上,在"比赛关键集群"中获得了显著的时间. 本分析突出了超越传统分工时间的有针对性的培训的关键细分.

科学领域:

运动科学运动科学运动科学
生物力学生物力学
绩效分析绩效分析

背景情况:

传统的越野滑雪表现分析依赖于围圈或地形分割.
滑雪运动是一项奥运会赛事,它结合了古典和自由式的技术,要求复杂的节奏策略.
滑雪运动中的微步策略仍未得到充分探索.

研究的目的:

为了研究精英男子滑雪运动中的微节奏策略.
为了确定影响比赛表现的比赛关键部分.
分析这些关键部分的技术和动力学差异.

主要方法:

利用全球导航卫星系统 (GNSS) 和托盘上装的传感器来跟踪13名国家级男子滑雪运动员.
应用一维统计参数映射 (SPM) 来分析瞬时速度配置文件.
确定了"比赛关键集群",其中速度显著预测了截面时间 (α=0.05).

主要成果:

自由式圈速比经典圈速快了4%.
古典技术表现出更大的地形特异性的速度变化和节奏变化,特别是下坡.
确定了七个比赛关键集群 (2个上坡,4个下坡,1个平面),占滑雪者之间的时间差距很大.
较快的滑雪者使用了更高轮子技术,并在这些集群中展示了不同的动力学配置文件 (更长的周期长度/更高的频率) (p<0.05).

结论:

竞赛关键的集群为精英滑雪者提供了相当大的时间优势.
技术执行和动力学配置文件对于这些细分市场的性能增长至关重要.
整合GNSS,SPM和可穿戴设备衍生技术分析可以改进培训,将培训重点放在决定性的课程段.

关键词:

周期长度周期长度动力学动力学微型定位 (Micro-Pacing) 是一个微型定位系统.部分技术部分技术地形分析地形分析时间间隔分析.

更多相关视频

Micro-particle Image Velocimetry for Velocity Profile Measurements of Micro Blood Flows

Published on: April 25, 2013

Assessment of Selective mRNA Translation in Mammalian Cells by Polysome Profiling

Assessment of Selective mRNA Translation in Mammalian Cells by Polysome Profiling

Published on: October 28, 2014

相关概念视频

Covalently Linked Protein Regulators

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....

Characteristics of Life

Characteristics of Life

Biology is a natural science that studies life and living organisms, including their structure, function, development, interactions, evolution, distribution, and taxonomy. The field's scope is extensive and divided into several specialized disciplines, such as anatomy, physiology, ethology, genetics, and many more. All living things share a few key traits, including cellular organization, heritable genetic material and the ability to adapt/evolve, metabolism to regulate energy needs, the...

What are Biogeochemical Cycles?

What are Biogeochemical Cycles?

The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.

The Water Cycle

The Water Cycle

The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living processes, the cycling of water is extremely important to ecosystem dynamics.

The Born-Haber Cycle

The Born-Haber Cycle

The Phosphorus Cycle

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.