不同護具穿戴型態對趨前著地之生物力學分析

莊聖維

doi:10.6344/NTUE.2010.00226

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不同護具穿戴型態對趨前著地之生物力學分析

Different types of Brace Worn on Biomechanical Analysis During Landing Phase

莊聖維 , Masters　　Advisor：翁梓林　　

繁體中文 DOI： 10.6344/NTUE.2010.00226

不同護具穿戴型態；時域振幅；最大自主收縮； Different types of brace worn ； Time-domain amplitude ； Maximum voluntary contraction

Abstract │ Reference (64) │ Times Cited (2) │ Altmetrics

Abstract 〈TOP〉

研究目的：探討不同護具介入對趨前著地動作之運動學及動力學參數之影響。方法：以八名無下肢傷痛病史之健康成年男性(年齡18.5±0.47歲、身高177.63 ±5.99公分、體重66.5± 3.12公斤)為研究對象。使用Mega Speed Ms30k高速攝影機（100Hz）、AMTI測力板（1000Hz)各一台、Biovision的肌電儀器（1000Hz）及50g雙軸加速規，同步擷取趨前著地動作資料，並針對緩衝期時間內參數進行分析。影片以Kwon3D 動作分析軟體處理，引用Dempster(1955)人體肢段參數(BSP)、直接線性轉換（DLT）及量化後取得運動學參數；測力板原始訊號利用DasyLab6.0分析軟體，經濾波（filter）、模組校正（scaling）得到原始三維分力；為了利於統計比較，將力量標準化（normalize)，以體重倍率（Body Wight，B.W.）表示。肌電訊號由DasyLab6.0軟體分析股直肌、股二頭肌、脛骨前肌、腓腸肌等肌群之原始肌電訊號後，進行10-500Hz的band-pass濾波處理，經全波整流上翻、10 Hz低通率波平滑化處理，再利用公式運算平均肌電振幅，並以各肌群之最大自主收縮(MVC)中間3秒之平均肌電振幅值作為基準值。加速規擷取著地時產生的水平及垂直時域振幅之全距進行比較。所得實驗參數使用SPSS for Windows 12.0套裝軟體以相依樣本單因子變異數（one-way ANOVA）檢定其差異（α=.05），當達顯著差異時，再使用LSD法加以事後比較。結果如下：
一、	髖、膝和踝關節之最大角速度、踝關節之角位移及落地角度變化，再增加護具穿戴後均變小，且達顯著差異（p＜.05）。
二、	垂直分力峰值時間縮短，而最大負荷率及50ms內被動衝量均會隨著護具穿戴而增大，有達顯著差異（p＜.05）。
三、	在緩衝期之腓腸肌肌電訊號有明顯下降，而膝關節振動產生之水平時閾振幅值達到顯著差異（p＜.05）。
    結論：穿戴護踝之後，落地前因護具束縛，導致蹠屈角度較未穿戴時預先減少了12度，當關節角度變小時，肌肉橫斷面變大，能產生的力量也較大，因此在足掌接觸地面時能以較大的力量進行緩衝，所以踝與膝關節的角速度均會因此下降。透過雙軸加速規量測膝關節之時域振幅了解，只穿戴護踝會使膝關節水平方向時域振幅達到最大，也就是最不穩定，反倒會增加膝關節受傷的風險。

Parallel Abstract 〈TOP〉

OBJECTIVES: To investigate involvement of different brace during landing phase on the Kinematic and kinetic parameters. Methods: Eight healthy without any history of lower limb pain of adult men (age 18.5 ± 0.47 years, height 177.63 ± 5.99 cm, weight 66.5 ± 3.12 kg) for the study. A Mega Speed Ms30k high-speed camera (100Hz), An AMTI force platform (1000Hz), Biovision EMG apparatus (1000Hz) and 50g dual-axis accelerometer. Synchronous capture landing phase motion data, and analysis parameters for the buffer period. Video motion analysis software to Kwon3D processing, reference Dempster (1955) Body segment parameters (BSP), the direct linear transformation (DLT) and quantified to obtain kinematic parameters; force plate analysis of the original signal using DasyLab6.0 software, filtered, module calibration by the original three-dimensional pitch. In order to statistical comparison, body weight (B.W) is used as the basis for standardization to obtain ground reaction force values and impulse values. The original signal of EMG from Rectus femoris (RF), Biceps femoris long head (BF), Tibialis anterior (TI) and Gastrocnemius lateral head (GAS) is processed by DASYLab 6.0 software to band-pass (10-500Hz), full-wave rectification and low-pass filtering (10Hz), after using the formula average EMG amplitude to get the iEMG value, divided by the iEMG value of maximum voluntary contraction (middle 3 seconds) as the basis for standardization (100%). Accelerometer capture the horizontal and vertical landing generate time-domain amplitude of range for comparison. Experimental parameters obtained using SPSS for Windows 12.0 software package paired ANOVA (one-way ANOVA) test the difference (α =. 05), when significant differences, the further LSD post hoc comparison. The results were as follows:
1.	Hip, knee and ankle joint angular velocity of the largest, angular displacement of the ankle joint angle and floor, after wearing the brace are smaller, and up significant different (p<.05).
2.	Shorter time to peak vertical force, while the maximum loading rate and 50ms volumes within the passive impulse increases as the brace worn were significantly difference (p <.05).
3.	In the buffer period, the gastrocnemius EMG decreased significantly, and the level of knee joint vibration of the threshold amplitude value reached significant difference (p <.05).
    Conclusion: After wearing ankle brace, as protector binding, resulting in plantar flexion before landing angle when compared with not wearing a decrease of 12 degrees in advance, When the joint angle decreases, muscle cross-section larger and larger force can be generated. Therefore, when the soles of the feet in contact with the ground forces capable of a larger buffer, so the angular velocity of ankle and knee will be diminished. Through the knee-axis accelerometer measurements to understand the time domain amplitude, will only wear ankle knee horizontal maximum amplitude in time domain, which is the most unstable it, it would increase the risk of knee injuries.

Reference ( 64 ) 〈TOP〉

周中明、林寶城（2000）。不同籃球鞋著地吸震性能之動力學分析。體育學報, 18, 195-206。
連結：
林志明（2009）。穿戴踝關節護具對單腳著地後迅速推蹬時下肢段之生物力學探討。未出版碩士論文，國立臺北教育大學，臺北市。
連結：
邱宏達（2002）。赤足與穿鞋跑步之著地策略分析。大專體育學刊，4，100-108。
連結：
李書維、黃長福（1995）。不同高度赤腳著地動作之生物力學分析。體育學報，20，213-224。
連結：
許太彥（2003）。國小學童不同軟硬表面著地下肢勁度調節之機轉及其影響。未出版博士論文，國立臺灣師範大學，臺北市。
連結：

Times Cited (2) 〈TOP〉

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