مقایسۀ دامنۀ حرکتی مفاصل و قدرت ایزومتریک عضلات اندام تحتانی در ورزشکاران دختر با و بدون ولگوس داینامیک زانو

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری حرکات اصلاحی، دانشکدۀ تربیت بدنی و علوم ورزشی، دانشگاه گیلان، رشت، ایران

2 استاد، دانشکدۀ تربیت بدنی و علوم ورزشی، دانشگاه گیلان، رشت، ایران

3 دانشیار، دانشکدۀ تربیت بدنی و علوم ورزشی، دانشگاه گیلان، رشت، ایران

چکیده

 
هدف پژوهش حاضر مقایسۀ قدرت ایزومتریک عضلات و دامنۀ حرکتی اندام تحتانی در ورزشکاران دختر با و بدون ولگوس داینامیک زانوست. بدین منظور 48 ورزشکار دختر سالم 18-15 ساله در دو گروه افراد دارای ولگوس داینامیک زانو حین حرکت اسکات که با بالا بردن پاشنۀ ولگوس آنها اصلاح می­شد (24 نفر) و افراد بدون ولگوس داینامیک زانو (24 نفر به‌عنوان گروه کنترل) و بدون سابقۀ آسیب‌دیدگی در گذشته، قرار گرفتند. حداکثر قدرت ایزومتریک با استفاده از داینامومتر دستی برحسب کیلوگرم و دامنۀ حرکتی فعال با استفاده از گونیامتر استاندارد پلاستیکی و برحسب درجه ارزیابی شد. تجزیه‌وتحلیل داده‌ها با استفاده از آزمون t مستقل و MANOVA (با سطح معنا‌داری 05/0P≤) انجام گرفت. نتایج نشان داد در گروه دارای نقص ولگوس داینامیک زانو به‌طور معنا­داری میانگین دامنۀ حرکتی دورسی فلکشن مچ پا (­با زانوی راست­) (F1,46 =5.503, P=0.023)، قدرت ایزومتریک پلنتارفلکشن مچ پا (F1,46 =4.187, P=0.046 ) نسبت به گروه کنترل کمتر است و در سایر متغیرها تفاوت معنا­داری بین دو گروه مشاهده نشد. در پژوهش حاضر افراد گروه ولگوس داینامیک زانو دارای عضلات سفت و ضعیف لترال و مدیال گستروکنمیوس بودند. با توجه به نتایج پژوهش حاضر، کاهش دامنۀ حرکتی دورسی فلکشن مچ پا، به‌عنوان عامل مؤثری در تغییر الگوی حرکتی اندام تحتانی و در نتیجه یک ریسک‌فاکتور برای آسیب­های زانو باید مورد توجه مربیان و پزشکان قرار گیرد.

کلیدواژه‌ها


عنوان مقاله [English]

A Comparison of Range of Motion of Joints and Isometric Strength of Lower Extremity Muscles in Female Athletes with and without Dynamic Knee Valgus

نویسندگان [English]

  • sareh shahheidari 1
  • ali asghar norasteh 2
  • hasan daneshmandi 3
1 PhD Student of Corrective Exercises, Faculty of Physical Education and Sport Sciences, University of Guilan, Rasht, Iran
2 Professor, Faculty of Physical Education and Sport Sciences, University of Guilan, Rasht, Iran
3 Associate Professor, Faculty of Physical Education and Sport Sciences, University of Guilan, Rasht, Iran
چکیده [English]

 
The aim of this study was to compare isometric strength and range of motion (ROM) of lower extremity in female athletes with and without dynamic knee valgus. 48 healthy female athletes (age range 15-18 years) in two groups: those with dynamic knee valgus during squat movement that was corrected by a heel lift (n=24) and those with no dynamic knee valgus (n=24 as the control group) with no injury in the past participated in this study. Maximum isometric strength was measured in kilograms using a hand-held dynamometer and active ROM was measured in degrees with a standard plastic goniometer. Independent t test and MANOVA were used to analyze data (P≤0.05). The results showed that the group with dynamic knee valgus had significantly lower mean ankle dorsiflexion ROM (with right knee) (F1.46=5.503, P=0.023) and isometric strength of ankle plantar flexion (F1.46=4.187, P=0.046) than the control group. No other significant differences were observed between the groups. The subjects with dynamic knee valgus exhibited tight and weak lateral and medial gastrocnemius muscles. This result indicated that decreased ankle dorsiflexion ROM as a factor affecting the alteration of movement pattern of lower extremity and consequently a risk factor for knee injuries must receive the attention of clinicians and trainers.

کلیدواژه‌ها [English]

  • dynamic knee valgus
  • Lower Extremity
  • muscle strength
  • range of motion

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