新西兰物理学作业代写 动力学变量

2020-05-10 02:27

此前，研究人员已经观察到降落过程中的下肢运动学，例如膝盖、臀部和脚踝的屈曲度。也对着陆过程中的动力学变量进行了研究，如垂直地面反力峰值等。Frobell等人指出，地面反力的大小在着陆过程中会对下端造成很大的风险。多名研究人员认为，从一个较大的高度，将有一个更高的峰值地面反作用力和挠曲。跳跃着陆要求身体在进行着陆时利用几种运动模式来吸收身体的能量。有两种流行的策略，通常使用时，从一个跳跃着陆。它们是，脚趾先着地，脚跟先着地。运动员通常会有他们自己独特的着陆技术，这些技术通常会基于他们自己的喜好和/或活动/运动需求。这些策略中的任何一种都具有特定的运动学模式，这种模式会影响到下肢角运动学的节段间值。不同的技术可以使你容易受到不同的伤害，Butler等人(2003)报告说膝盖僵硬可能与先着地脚趾紧密相关。膝关节的不稳定性导致限制运动运动(ROM)的范围内,从而进一步导致的持续循环重复这项研究的目的是评估的效果额外的体重下降着陆跳跃,而看着地面反作用力和运动的差异。假设在增加重量时，地面反力、屈曲和外展的峰值会有显著差异。
新西兰物理学作业代写 动力学变量
Previously, researchers have observed lower extremity kinematics during drop landing, for example, degrees of flexion in the knee, hip and ankle . Investigations have also been made into kinetic variables during landing such as peak vertical ground reaction force  Frobell et al stated that amount of ground reaction force creates a high risk on the lower extremity during landing from jumps. It has been suggested by multiple researchers that from a larger height there will be a higher peak in ground reaction force and flexion.Jump landings require the body to exploit several movement patterns to absorb the body’s energy when conducting a landing. There are 2 popular strategies that are normally used when landing from a jump. These are, Toe landing first and Heel landing first. Athletes will normally have their own landing techniques which are often unique to them, these techniques will normally be based on their own preference and/or activity/sporting demands. Any of these strategies will have a particular kinematic pattern which can affect the lower extremity angular kinematic intersegmental values. Different techniques can make you prone to different injuries, Butler et al. (2003) reported that knee stiffness can be closely related to landing on the toes first. Instability of the knee joints leads to restricted movement within the range of motion (ROM), which can then further result in a ongoing cycle of repeated The purpose of this study was to assess the effect of an added weight on drop jump landing, while looking at ground reaction force and kinematic differences. It is hypothesized that when weight is added there will be a significant difference in the peaks of ground reaction force, flexion and abduction.

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