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Mohammadzadeh Asl, Raana, shojaeddin, Seyed Sadrodin. (1397). The Effect of Fatigue on Peak Vertical Ground Reaction Force in Women with Different Knee Alignments during Single-Leg Jump and Drop Landing. , 10(2), 185-196. doi: 10.22059/jsmed.2019.210852.753
Raana Mohammadzadeh Asl; Seyed Sadrodin shojaeddin. "The Effect of Fatigue on Peak Vertical Ground Reaction Force in Women with Different Knee Alignments during Single-Leg Jump and Drop Landing". , 10, 2, 1397, 185-196. doi: 10.22059/jsmed.2019.210852.753
Mohammadzadeh Asl, Raana, shojaeddin, Seyed Sadrodin. (1397). 'The Effect of Fatigue on Peak Vertical Ground Reaction Force in Women with Different Knee Alignments during Single-Leg Jump and Drop Landing', , 10(2), pp. 185-196. doi: 10.22059/jsmed.2019.210852.753
Mohammadzadeh Asl, Raana, shojaeddin, Seyed Sadrodin. The Effect of Fatigue on Peak Vertical Ground Reaction Force in Women with Different Knee Alignments during Single-Leg Jump and Drop Landing. , 1397; 10(2): 185-196. doi: 10.22059/jsmed.2019.210852.753

The Effect of Fatigue on Peak Vertical Ground Reaction Force in Women with Different Knee Alignments during Single-Leg Jump and Drop Landing

Sport Sciences and Health Research
مقاله 3، دوره 10، شماره 2، خرداد 2018، صفحه 185-196    اصل مقاله (712.18 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22059/jsmed.2019.210852.753
نویسندگان
Raana Mohammadzadeh Asl* 1؛ Seyed Sadrodin shojaeddin2
1MSc, Department of Corrective Exercises and Sport Injury, Faculty of Physical Education, Kharazmi University, Tehran, Iran
2Associate Professor of Corrective Exercises and Sports Injuries, Kharazmi University of Tehran, Iran
چکیده
Deviation from the standard alignment of knee joint may changes weight distribution procedure and therefore reduces the mechanical efficiency. Understanding the biomechanical changes resulting from these deformities during fatigue is an important step in the prevention of subsequent injuries. So, the aim of this study was to investigate the effect of fatigue on peak vertical ground reaction force during single-leg drop landing in women with genu varum, genu valgum and normal knee. 40 healthy female students of physical education and sport sciences with genu varum deformity (n=14), genu valgum deformity (n=14) and normal knee (n=12) participated in this study. Caliper was used to assess alignment of knee and the subjects were divided into three groups (genu varum, genu valgum and normal knee). Then, subjects performed single-leg drop landing from 50% of maximum sergeant jump onto the force platform. After the fatigue protocol, jump-drop landing task was measured and recorded again. Analysis of variance with repeated measures was used for within-group comparison. The peak vertical ground reaction force was not significant in women with different knee alignments (P=0.314) and also fatigue had no significant difference in this variable (P=0.479). According to these results, it seems that fatigue (according to the protocol in this study) could not change vertical ground reaction force in those subjects with different knee alignments which paves the way for further research with different fatigue protocols.
کلیدواژه‌ها
fatigue؛ genu valgum؛ genu varum؛ single-leg drop landing؛ vertical reaction force
عنوان مقاله [English]
اثر خستگی بر حداکثرنیروی عمودی عکس العمل زمین در زنان با راستاهای متفاوت زانو در پرش و فرود تک پا
نویسندگان [English]
رعنا محمدزاده اصل1؛ سید صدرالدین شجاع الدین2
1کارشناس ارشد، گروه حرکات اصلاحی و آسیب شناسی ورزشی، دانشکده تربیت بدنی، دانشگاه خوارزمی ، تهران،ایران
2دانشیار حرکات اصلاحی و آسیب شناسی ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه خوارزمی، تهران، ایران
چکیده [English]
زمینه و هدف: انحراف در راستای مطلوب مفصل زانو موجب تغییر در چگونگی توزیع وزن و در نتیجه کاهش کارایی مکانیکی آن می­شود (1و2). آگاهی از میزان تغییرات بیومکانیکی حاصل از این ناهنجاری­ها به هنگام خستگی گام مهمی در جهت پیشگیری از بروز آسیب­های بعدی می­باشد لذا هدف از  این تحقیق، بررسی اثر خستگی بر حداکثر نیروی عمودی عکس العمل زمین در حرکت فرود تک پای زنان دارای زانوی پرانتزی، ضربدری و نرمال بود.
مواد و روش­ها: 40 دانشجوی زن سالم رشتة تربیت­بدنی و علوم ورزشی، دارای زانوی پرانتزی(14نفر)، زانوی ضربدری (14نفر) و زانوی نرمال(12نفر) در این تحقیق شرکت کردند. از کولیس برای ارزیابی راستای زانوی استفاده شد و آزمودنی ها در سه گروه (زانو پرانتزی، ضربدری و نرمال) قرار گرفتند. سپس آزمودنی­ها فرود تک­پا را از 50 درصد حداکثر پرش سارجنت بر روی صفحه نیرو انجام دادند. پس از اجرای پروتکل خستگی، تکلیف پرش_فرود دوباره اندازه­گیری و ثبت شد. برای مقایسه درون­گروهی، آزمون تحلیل واریانس اندازه­گیری مکرر استفاده شد.
یافته­ها­: مقدار حداکثر نیروی عمودی عکس­العمل زمین در زنان با راستاهای متفاوت زانو (p=0/314) معنادار نبوده و همچنین خستگی (p=0/479) بر مقدار این مولفه تفاوت معناداری نداشته است.
نتیجه­گیری: باتوجه به نتایج تحقیق حاضر به نظر می رسد خستگی (مطابق پروتکل این تحقیق) نتوانست میزان نیروی عمودی عکس العمل زمین در افراد با راستاهای مختلف زانو را دست خوش تغییر سازد که ضرورت انجام مطالعات بیشتر با پروتکل های مختلف خستگی را روشن می­ سازد.
کلیدواژه‌ها [English]
خستگی, زانوی پرانتزی, زانوی ضربدری, فرود تک پا, نیروی عمودی عکس‌العمل
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