تأثیر هایپرکایفوزیس بر استراتژی بازیابی تعادل جوانان و سالمندان در پاسخ به اغتشاشات ناگهانی

نویسندگان

1 دانشجوی دکتری، گروه آسیب‌شناسی ورزشی و حرکات اصلاحی، دانشکدۀ تربیت‌بدنی، دانشگاه شهیدباهنر،کرمان، ایران

2 استاد گروه آسیب‌شناسی و حرکات اصلاحی، دانشکدۀ تربیت‌بدنی دانشگاه شهیدباهنر، کرمان، ایران

3 استادیار گروه آسیب‌شناسی و حرکات اصلاحی، دانشکدۀ تربیت‌بدنی دانشگاه شهیدباهنر، کرمان، ایران

چکیده

مقدمه و هدف: تغییر در استراتژی بازیابی تعادل به‌عنوان یکی از ریسک‌فاکتورهای زمین‌خوردن سالمندان شناخته می‌شود. هدف از تحقیق حاضر پاسخ به این سؤال است که آیا انتقال استراتژی بازیابی تعادل سالمندان از مچ ‌پا به‌سمت ران، تحت‌تأثیر افزایش طبیعی زاویۀ کایفوز در اثر افزایش سن قرار می‌گیرد یا خیر؟
 
مواد و روش‌ها: به‌همین منظور، شصت آزمودنی مرد به‌صورت تصادفی انتخاب شدند و با توجه به هدف تحقیق، در یکی از چهار گروه سالمندان کایفوتیک، سالمندان نرمال، جوانان کایفوتیک و جوانان نرمال  (به‌ترتیب با میانگین سنی 7/3±3/65، 1/3±5/63، 7/1±7/23 و 1/1±3/24 سال) قرار گرفتند. در ادامه، جهت ارزیابی استراتژی بازیابی تعادل، اعمال آشفتگی از طریق حرکت ناگهانی دستگاه تردمیل صورت گرفت و نوسانات دامنۀ حرکتی مچ ‌پا و ران آزمودنی‌ها توسط سیستم Motion Analysis ثبت گردید. سطح معنی‌داری در این تحقیق 05/0P≤ در نظر گرفته شد.
 
نتایج: تحلیل داده‌ها نشان داد که در مقایسه با جوانان، نوسانات دامنۀ حرکتی مفاصل سالمندان از مچ ‌پا به‌سمت ران انتقال پیدا کرده است (05/0>P < /span>). نتایج همچنین نشان داد که با وجود افزایش نوسانات، دامنۀ حرکتی مفاصل در اثر هایپرکایفوزیس (از 5درصد تا 24درصد)، این افزایش نوسانات در هر دو گروه جوان و سالمند معنی‌دار نمی‌باشد (05/0<P < /span>).
 
نتیجه‌گیری: به‌طور کلی می‌توان اظهار داشت که بازیابی تعادل در سالمندان عمدتاً از طریق استراتژی ران و در جوانان عمدتاً از طریق استراتژی مچ ‌پا صورت می‌گیرد. از طرفی، به نظر می‌رسد که این تغییرات در استراتژی‌های تعادلی سالمندان تحت‌تأثیر افزایش طبیعی زاویۀ کایفوز در اثر افزایش سن قرار نگرفته و از عوامل دیگری تأثیر می‌پذیرد.
 
 

کلیدواژه‌ها


عنوان مقاله [English]

The effect of hyperkyphosis on balance recovery strategy of young and old people in response to sudden perturbations

نویسندگان [English]

  • Ramin Beyranvand 1
  • Mansour Sahebozamani 2
  • Abdolhamid Daneshjoo 3
چکیده [English]

Background and Objective: Change in balance recovery strategy is one of the risk factors for falls in the elderly. The aim of this study was to answer the question whether the transfer of balance recovery strategy from ankle to hip joint in elderly is affected by natural increase of kyphosis with aging or not.
 
Materials and Methods: In this study, 60 men were randomly selected and classified in four groups: the kyphotic elderly, normal elderly, kyphotic youth and normal youth (respectively with a mean age of 65.3±3.7, 63.5±3.1, 23.7±1.7 & 24.3±1.1 years). For assessment of the balance recovery strategy, perturbation was done through sudden movement of the treadmill. Range of motion (ROM) of the ankle and hip joint of subjects were recorded by a motion analysis system when perturbation was done. The significance level was considered p<0/05.
 
Results: Data analysis showed that ROM of the ankle is transferred to hip joint in elderly compared to young people (p<0/05). The results also showed that despite the increased ROM in hyperkyphotic people (from 5% to 24%), this increase in both young and elderly people were not significant (p>0/05).
 
Conclusion: In general, it can be said that elderly had mainly hip dominant strategy and youth had mainly ankle dominant strategy for balance recovery. On the other hand, it seems that the changes in balance recovery strategies of older people is not affected by the natural increase of kyphosis angle due to aging and it is affected by other factors.
 

کلیدواژه‌ها [English]

  • Kyphosis
  • Postural control
  • Elderly
  • Young
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