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新西蘭物理學作業代寫 動力學變量

2020-05-10 02:27

此前,研究人員已經觀察到降落過程中的下肢運動學,例如膝蓋、臀部和腳踝的屈曲度。也對著陸過程中的動力學變量進行了研究,如垂直地面反力峰值等。Frobell等人指出,地面反力的大小在著陸過程中會對下端造成很大的風險。多名研究人員認為,從一個較大的高度,將有一個更高的峰值地面反作用力和撓曲。跳躍著陸要求身體在進行著陸時利用幾種運動模式來吸收身體的能量。有兩種流行的策略,通常使用時,從一個跳躍著陸。它們是,腳趾先著地,腳跟先著地。運動員通常會有他們自己獨特的著陸技術,這些技術通常會基于他們自己的喜好和/或活動/運動需求。這些策略中的任何一種都具有特定的運動學模式,這種模式會影響到下肢角運動學的節段間值。不同的技術可以使你容易受到不同的傷害,Butler等人(2003)報告說膝蓋僵硬可能與先著地腳趾緊密相關。膝關節的不穩定性導致限制運動運動(ROM)的范圍內,從而進一步導致的持續循環重復這項研究的目的是評估的效果額外的體重下降著陸跳躍,而看著地面反作用力和運動的差異。假設在增加重量時,地面反力、屈曲和外展的峰值會有顯著差異。
新西蘭物理學作業代寫 動力學變量
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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