相关实验视频
Updated: May 8, 2025

02:43
Importance of Jumping Ability in Handball Throwing Speed and Accuracy
Published on: April 4, 2025
166
影响跨阶段表现的关键因素在初级短冲刺中的演变
Kyosuke Oku1, Yoshihiro Kai2, Hitoshi Koda3
1Faculty of Arts and Sciences, Kyoto Institute of Technology, Hashikami-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
Sports (Basel, Switzerland)
|December 27, 2024
概括
年轻的运动员.
科学领域:
- 运动科学 运动科学 运动科学
- 运动生理学 运动生理学
- 生物力学 生物力学
背景情况:
- 在许多体育运动中,冲刺表现至关重要,短短的冲刺很常见.
- 我们对冲刺加速阶段物理因素如何相互作用的理解有限.
- 已知肌肉强度和冲刺表现的年龄相关变化,但细微的相互作用需要进一步研究.
研究的目的:
- 研究初级运动员不同间隔 (0-2.5m,2.5-5m,5-10m) 的冲刺时间和各种身体因素之间的关系.
- 在加速阶段确定冲刺表现的关键物理决定因素.
- 根据冲刺间隔,探索这些关系中的差异.
主要方法:
- 使用计时灯测量0m,2.5m,5m和10m的冲刺时间.
- 评估了初级运动员 (13名男生,13名女生) 的身体组成,弹性 (部和核心),肌肉力量 (站立远跳) 和体能.
- 利用部分相关性分析来检查冲刺间隔和物理因素之间的关系.
主要成果:
- 冲刺时间随着年龄的增长而增加,并且与肌肉强度和灵活性相关.
- 较快的0-2.5米冲刺时间与更好的部灵活性有关.
- 更快的2.5-5m冲刺时间与核心灵活性相关,更快的5-10m时间与站立远跳性能.
- 较低的无脂肪体重与跨间隔的更高的冲刺表现有关.
- 灵活性和水平推进力是10米冲刺加速阶段的关键因素.
结论:
- 影响冲刺表现的因素即使在短距离 (10米) 上也会显著改变.
- 部和核心的灵活性,推进力和身体脂肪的调节对于初级短跑者来说至关重要.
- 培训计划应根据特定的冲刺距离量身定制,强调整体灵活性和动力发展.
相关概念视频
Exercise and Muscle Performance
1.2K
Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
1.2K
Factors Affecting Activity Coefficient
671
The extended Debye-Hückel equation indicates that the activity coefficient of an ion in an aqueous solution at 25°C depends on three partially interdependent properties: the ionic strength of the solution, the charge of the ion, and the ion size.
The activity coefficient value for an ion is close to one when the solution has almost zero ionic strength, i.e., when the solution shows close to ideal behavior. As the ionic strength of the solution increases from 0 to 0.1 mol/L, a...
The activity coefficient value for an ion is close to one when the solution has almost zero ionic strength, i.e., when the solution shows close to ideal behavior. As the ionic strength of the solution increases from 0 to 0.1 mol/L, a...
671
Limits to Natural Selection
30.8K
Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
30.8K
Social Facilitation
31.5K
Not all intergroup interactions lead to negative outcomes. Sometimes, being in a group situation can improve performance. Social facilitation occurs when an individual performs better when an audience is watching than when the individual performs the behavior alone. This typically occurs when people are performing a task for which they are skilled.
31.5K
Pathophysiology of Cardiac Performance
466
Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...
466
Cohesion
50.2K
Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a...
On a...
50.2K

