اثر سه هفته برنامۀ تمرینی عصبی عضلانی و ماندگاری آن بر الگوی حرکتی فرود-پرش در دختران فعال دارای ولگوس زانو

نوع مقاله: مقاله پژوهشی

نویسندگان

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

2 استاد، دانشکدۀ تربیت بدنی، دانشگاه گیلان، رشت، ایران

چکیده

ولگوس داینامیک زانو حین کاهش شتاب و فرود در فعالیت‌های ورزشی می‌تواند عامل بسیاری از آسیب‌های حاد و مزمن زانو در زنان ورزشکار باشد. هدف از پژوهش حاضر بررسی اثر سه هفته تمرین عصبی عضلانی و ماندگاری آن پس از سه ماه بر الگوی حرکتی فرود پرش در دانش‌آموزان دختر فعال 18-15 سالۀ دارای ولگوس داینامیک زانو بود. بدین‌منظور با استفاده از تست اسکات دوپا داوطلبان شرکت در پژوهش غربالگری شدند و در نهایت 24 نفر دارای ولگوس داینامیک زانو (12 نفرگروه تمرین و 12 نفر گروه کنترل) به‌عنوان آزمودنی انتخاب شدند. زاویۀ ولگوس و فلکشن زانو با روش ارزیابی دوبعدی با استفاده از دو عدد دوربین ویدئویی کاسیو ساخت ژاپن، مدل CASIO-Ex-F1، قبل و بلافاصله پس از اعمال برنامۀ تمرینی در دو گروه کنترل و تمرین و مجدداً زاویۀ ولگوس زانو سه ماه بعد حین اجرای تست فرود پرش محاسبه شد. برای مقایسۀ زاویۀ فلکشن و ولگوس داینامیک زانو قبل و بلافاصله بعد و سه ماه پس از اعمال برنامۀ تمرینی در گروه کنترل و تمرین از آزمون آماری Repeated measures و در صورت معنا‌داری از آزمون t مستقل و t همبسته برای تشخیص تفاوت‌های بین‌گروهی و درون‌گروهی استفاده شد. نتایج نشان داد میانگین زاویۀ ولگوس زانو در گروه تمرین پس از اعمال مداخلۀ تمرینی کاهش یافته و این اختلاف معنا‌دار است (001/0=P) همچنین میانگین زاویۀ فلکشن زانو گروه تمرین افزایش معنا‌داری یافته است (04/0=P). همچنین نتایج آزمون t زوجی برای مقایسۀ زاویۀ ولگوس زانو در گروه تمرین پس از اتمام پروتکل و سه ماه پس از آن افزایش معنا‌داری را در این متغیر نشان داد (05/0=P). نتایج پژوهش حاضر نشان داد اگرچه مداخلۀ تمرینی عصبی عضلانی سه‌هفته‌ای موجب بهبود الگوی حرکتی فرود پرش در دانش‌آموزان دختر فعال می‌شود، میزان ماندگاری اثر این تمرینات پس از سه ماه کاهش می‌یابد.

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of a 3-Week Neuromuscular Training Program and Its Retention on the Movement Pattern of Drop Vertical Jump in Active Girls with Knee Valgus

نویسندگان [English]

  • sareh shahheidari 1
  • aliasghar norasteh 2
  • hasan daneshmandi 2
1 Ph.D Student of Corrective Exercises, Faculty of Physical Education, University of Guilan, Rasht, Iran2
2 Professor, Faculty of Physical Education, University of Guilan, Rasht, Iran
چکیده [English]

Dynamic knee valgus during deceleration and drop landing in sport activities can be the cause of many acute and chronic knee injuries in female athletes. This study examined the effect of 3 weeks of neuromuscular training and its retention after 3 months on the movement pattern of drop vertical jump in 15-18-year-old active girls with dynamic knee valgus. Volunteers were screened by double legged squat test and finally, 24 subjects with dynamic knee valgus (12 subjects in the training group and 12 subjects in the control group) were selected as the sample. Knee valgus and flexion angles were calculated using two dimensional evaluation method with two video cameras (CASIO-Ex-F1, made in Japan) before and immediately after the training program in both groups and knee valgus angle was again calculated 3 months later during drop vertical jump test. Repeated measures was used to compare knee valgus and flexion angles before and immediately after and 3 months after the training intervention in control and training groups. In case of significance, independent and dependent t tests were used to recognize within- and between-group differences. The results showed that knee valgus angle mean decreased after training in the training group and this difference was significant (P=0.001). Also, knee flexion angle mean in the training group increased significantly (P=0.04). The results of paired sample t test showed a significant increase in this variable after the training and 3 months later in knee valgus angle in the training group (P=0.05). Results showed that although a 3-week neuromuscular training intervention improved movement pattern of drop vertical jump in active female students, the retention of the effect of this training decreased after 3 months.

کلیدواژه‌ها [English]

  • Knee valgus retention
  • movement pattern
  • neuromuscular training
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