The Effect of Altering Knee Position and Squat Depth on VMO?:?VL EMG Ratio During Squat Exercises

Jaberzadeh Shapour; Yeo Daniel; Zoghi Maryam

摘要

Abstract <section xml:id="pri1631-sec-0017" numbered="no"> <title type="main">Background >Patellofemoral pain syndrome is an extremely common condition, believed to be caused by altered activation of vastus medialis obliquus (VMO), leading to maltracking of the patella. </section> <section xml:id="pri1631-sec-0018" numbered="no"> <title type="main">Aim >This study aimed to investigate the effect of altering knee movement and squat depth on the ratio of VMO and vastus lateralis (VMO?:?VL) during squat exercises. </section> <section xml:id="pri1631-sec-0019" numbered="no"> <title type="main">Method >Eighteen (7 male and 11 female) healthy, asymptomatic participants performed semi‐squat exercises with three squat depths (20°, 50° and 80° of knee flexion) while following three knee movement paths (neutral, varus or valgus). Normalized VMO?:?VL ratio from linear envelope surface electromyography was analysed. </section> <section xml:id="pri1631-sec-0020" numbered="no"> <title type="main">Results > No significant effect was found for gender ( p ?=?0.87), leg dominance ( p ?=?0.99) or knee position ( p ?=?0.44). A significant effect was found for squat depth ( p ??0.001) with both the 50° and 80° squats showing increases in VMO?:?VL ratio ( p ?=?0.031 and p ?=?0.028), respectively. The VMO?:?VL ratio was not influenced by gender, leg dominance or knee position in semi‐squat exercises. </section> <section xml:id="pri1631-sec-0021" numbered="no"> <title type="main">Discussion and Conclusion >Increases in relative VMO activation did occur in ‘deeper’ squat depths (50° and 80° knee flexion) compared with the 20° condition. Further research is needed in this area concerning the effects of such exercise modifications on a symptomatic patellofemoral pain syndrome population. Copyright ? 2015 John Wiley & Sons, Ltd. </section> </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract XMLNS =“http://www.wiley.com/namespaces/wiley”type =“main”> <title type =“main”>抽象</ title> <section XML：ID =“PRI1631-SEC-0017 “编号=”否“> <标题类型=”main“>背景</ title> > Patellofemoral疼痛综合征是一种极其常见的条件，被认为是由夸张的Medialis倾斜（VMO）的改变激活引起的，导致毫无特许髌骨。</ p> </ section> <section XML：ID =“PRI1631-SEC-0018”编号=“否”> <标题类型=“main”> AIM </标题> <P>本研究旨在探讨在蹲锻炼期间改变膝关节运动和蹲下深度（VMO？：？VL）比率的效果。</ p> </ section> <section XML：ID =“PRI1631-SEC-0019 “编号=”否“> <标题类型=”main“>方法</标题> >十八（7只男性和11名女性）健康，无症状参与者进行半蹲练习，三个蹲下深度（20°，50°，50°和80°的膝关节屈曲）在三个膝上运动路径（中性，瓦鲁斯或止原）之后。归一化VMO？：α：Δvl与线性包络表面电拍摄的比率进行分析。</ p> </ section> <section xml：id =“pri1631-sec-0020”编号=“否”> <标题类型=“main”>结果</标题> >对性别（ p </ i>α=Δ=Δ0.87），腿部支配（ p </ i>α=Δ0.99）或膝关节（ p </ i>？= 0.44）。发现蹲伏深度（ p </ i>Δx≤00.<0.001）发现显着的效果，显示VMO的增加（80°蹲下）：Δvl比（ p </ i> ？= 0.031和 p </ i>？= 0.028）。 VMO？：vl比率不受半蹲锻炼中性别，腿部支配或膝关节的影响。 </ p> </ section> <第XML：ID =“PRI1631-SEC-0021”编号=“否”> <标题类型=“main”>讨论和结论</ title> >相对VMO激活的增加与20°状况相比，在“更深的”蹲下深度（50°和80°和80°弯曲）中发生。在该地区需要进一步研究，涉及这种运动修饰对症状髌果疼痛综合征群体的影响。版权？ 2015年John Wiley＆amp; SONS，LTD。</ p> </ section> </ abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" > 著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-29572/'>《Physiotherapy research international: the journal for researchers and clinicians in physical therapy 》</a> <b style="margin: 0 2px;">|</b><span>2016年第3期</span><b style="margin: 0 2px;">|</b> <span>共10页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Jaberzadeh Shapour&option=202" target="_blank" rel="nofollow">Jaberzadeh Shapour;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Yeo Daniel&option=202" target="_blank" rel="nofollow">Yeo Daniel;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zoghi Maryam&option=202" target="_blank" rel="nofollow">Zoghi Maryam;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Department of Physiotherapy Faculty of Medicine Nursing and Health SciencesMonash;</p> <p>Physica Devonport PhysiotherapyDevonport Australia;</p> <p>Department of Medicine (Royal Melbourne Hospital)The University of MelbourneMelbourne Australia;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li> <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span> <a href="https://www.zhangqiaokeyan.com/clc/1476.html" title="治疗学">治疗学 ;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=patellofemoral joint&option=203" rel="nofollow">patellofemoral joint;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=squat exercises&option=203" rel="nofollow">squat exercises;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=vastus medialis obliquus&option=203" rel="nofollow">vastus medialis obliquus;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=vastus lateralis&option=203" rel="nofollow">vastus lateralis;</a> </p> <div class="translation"> 机译：Patellofemoral关节;蹲练习;对角线浪费内侧;垃圾横向; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704024547558.html">The Effect of Altering Knee Position and Squat Depth on VMO?:?VL EMG Ratio During Squat Exercises</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Jaberzadeh Shapour&option=202" target="_blank" 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