定义下肢优势：优势下肢与两项功能任务之间的关系。
DEFINING LOWER EXTREMITY DOMINANCE: THE RELATIONSHIP BETWEEN PREFERRED LOWER EXTREMITY AND TWO FUNCTIONAL TASKS.
作者信息
Carcia Christopher R, Cacolice Paul A, McGeary Scott
机构信息
Duquesne University, Pittsburgh, PA, USA.
Movement Science, Sport & Leisure Studies Department, Westfield State University, Westfield, MA, USA.
出版信息
Int J Sports Phys Ther. 2019 Apr;14(2):188-191.
BACKGROUND
A commonly utilized operational definition of lower extremity (LE) dominance assumes the LE with which a participant prefers to kick a ball with is the same preferred LE a participant would choose for a unilateral landing task.
HYPOTHESIS/PURPOSE: The purpose of this study was to determine the relationship between the preferred lower extremity (LE) when performing a unilateral landing and kicking task. The authors hypothesized a strong correlation between the LE the participant chose for the landing task and the LE the participant chose for the kicking task would be evident.
STUDY DESIGN
Repeated measures.
METHODS
A convenience sample of 50 (age = 21.9 ± 0.9 years; sex = 27 female; 23 male; height = 170.6 ± 10.8 cm; weight = 73.3 ± 18.3 kg) healthy, recreationally active college aged students performed two tasks (kicking a ball; unilateral drop jump landing) in a counterbalanced order.
RESULTS
Thirty-three participants kicked and landed with their right LE; 14 kicked with the right and landed on their left; two kicked and landed with their left and one participant kicked with their left and landed on their right LE. The Phi Coefficient (ϕ = 0.18; p = 0.18) indicated little to no relationship between the preferred LE for kicking a ball and landing from a drop jump. Similarly, the Chi-squared statistic revealed no differences between observed and expected frequencies (χ2 = 1.76; p = 0.23).
DISCUSSION
When studying anterior cruciate ligament injury mechanisms in the laboratory, most investigators examine characteristics of the dominant LE. Dominance is frequently defined by which LE the individual kicks a ball with. The majority of ACL injuries however occur to the landing or plant LE. Hence, LE limb selection based on this approach may be flawed.
CONCLUSION
A significant relationship was not evident between the preferred LE for kicking a ball and a unilateral landing in a group of healthy recreationally active college aged students. The data suggests the preferred LE for kicking a ball and a unilateral landing task is not necessarily the same.
LEVEL OF EVIDENCE
Level 3.
背景
下肢（LE）优势的一种常用操作定义假设，参与者在踢足球时偏好使用的下肢与在单侧落地任务中会选择的偏好下肢是相同的。
假设/目的：本研究的目的是确定在进行单侧落地和踢腿任务时，偏好的下肢（LE）之间的关系。作者假设，参与者在落地任务中选择的下肢与在踢腿任务中选择的下肢之间存在明显的强相关性。
研究设计
重复测量。
方法
便利抽样选取50名（年龄=21.9±0.9岁；性别=27名女性，23名男性；身高=170.6±10.8厘米；体重=73.3±18.3千克）健康、有运动习惯的大学生，以平衡顺序进行两项任务（踢足球；单侧跳下落地）。
结果
33名参与者用右下肢踢腿和落地；14名用右脚踢腿，左脚落地；2名用左下肢踢腿和落地，1名参与者用左脚踢腿，右脚落地。Phi系数（ϕ = 0.18；P = 0.18）表明，踢足球时偏好的下肢与跳下落地时偏好的下肢之间几乎没有关系。同样，卡方统计量显示观察频率与预期频率之间没有差异（χ2 = 1.76；P = 0.23）。
讨论
在实验室研究前交叉韧带损伤机制时，大多数研究人员会检查优势下肢的特征。优势通常由个体踢足球时使用的下肢来定义。然而，大多数前交叉韧带损伤发生在落地或支撑下肢。因此，基于这种方法选择下肢可能存在缺陷。
结论
在一组健康、有运动习惯的大学生中，踢足球时偏好的下肢与单侧落地之间没有明显的显著关系。数据表明，踢足球时偏好的下肢与单侧落地任务时偏好的下肢不一定相同。
证据水平
3级。
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