防滑和后背重量对后位反应和在扰动期间稳定性的影响
Juaquin Acuna1, Briana Kiphen1, Alexander Lee1
1Crean College of Health and Behavioral Sciences, Chapman University, Orange CA 92866 USA.
概括
单独的防滑子可以提高稳定性,但当与外部重量相结合时,它们会增加姿势不稳定性和跌倒风险. 这凸显了鞋类与平衡控制增加负载之间的复杂相互作用.
科学领域:
- 生物力学 生物力学
- 人类运动科学科学 人类运动科学
- 运动学 运动学
背景情况:
- 防滑和外部重量是医疗保健和培训中常见的工具,用于增强稳定性.
- 防滑和外部重量在扰动期间对姿势反应的综合影响尚不清楚.
研究的目的:
- 调查防滑子和额外的前部重量对姿势反应的延迟和幅度的影响.
- 确定这些干预措施在意外扰乱期间如何影响平衡控制.
主要方法:
- 十名健康参与者接受了随机扰动条件.
- 条件包括使用防滑子和通过加重背心施加10%的体重负荷.
- 采用双向ANOVA和混合效应模型进行统计分析.
主要成果:
- 没有发现子,体重或它们的相互作用对反应延迟有显著影响.
- 对振幅观察到显著的相互作用效应 (p < 0.001),表明子和体重的组合增加了不稳定性.
- 仅仅防滑就显著降低了振幅,与赤脚条件相比,提高了稳定性.
结论:
- 防滑和外部重量的组合增加了姿势不稳定性和潜在的跌倒风险.
- 单独使用的防滑似乎可以增强姿势控制和稳定性.
- 研究结果表明,这些干预措施具有细微的效果,因此需要在不同人群中进行进一步的研究以获得临床应用.
相关概念视频
Types of Damping
If the amount of damping in a system is gradually increased, the period and frequency start to become affected because damping opposes, and hence slows, the back and forth motion (the net force is smaller in both directions). If there is a very large amount of damping, the system does not even oscillate; instead, it slowly moves toward equilibrium. In brief, an overdamped system moves slowly towards equilibrium, whereas an underdamped system moves quickly to equilibrium but will oscillate about...
Support Reactions
A coplanar force system refers to a set of forces that all lie in the same plane and are subject to different reactions between the point of contact and the supports. Understanding how different types of supports affect coplanar forces is crucial for designing safe and reliable structures that can withstand external loads.
The purpose of the supports is to prevent the translational motion of the system by applying an equal and opposite force and to prevent the system's rotation by applying a...
The purpose of the supports is to prevent the translational motion of the system by applying an equal and opposite force and to prevent the system's rotation by applying a...
Friction: Problem Solving
Friction is an essential force that influences the motion of objects in daily life. Depending on the situation, it can be either beneficial or problematic. Consider a bus with a mass of three megagrams and its center of mass at a specific point, moving along a banked road at a constant speed. The coefficient of static friction between the tires and the road is 0.5. Find the maximum angle of the banked road at which the bus would not slip or tip.
Initially, a visual representation of the...
Initially, a visual representation of the...
Rolling Resistance
When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down due to...
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down due to...
Stability of Equilibrium Configuration: Problem Solving
The stability of equilibrium configurations is an important concept in physics, engineering, and other related fields. In simple terms, it refers to the tendency of an object or system to return to its equilibrium position after being disturbed. The stability of an equilibrium configuration can be analyzed by considering the potential energy function of the system and examining its behavior near the equilibrium point.
Problem-solving in the context of the stability of equilibrium configuration...
Problem-solving in the context of the stability of equilibrium configuration...
Stability of structures
In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...


