نوع مقاله : مقاله پژوهشی Released under CC BY-NC 4.0 license I Open Access I
نویسندگان
1 دانشیار گروه رفتار حرکتی دانشکدۀ تربیت بدنی دانشگاه شهید بهشتی، تهران، ایران
2 کارشناس‌ارشد گرایش رفتار حرکتی دانشگاه شهید بهشتی، تهران، ایران
چکیده
هدف از پژوهش حاضر تعیین تأثیر سطوح مختلف دشواری تکلیف تعادلی و بازخورد بینایی بر تعادل زنان سالمند بود. 14 زن سالمند سالم با میانگین سنی 57/65 سال داوطلبانه در این تحقیق شرکت کردند. از هر کدام از آزمودنی‌ها خواسته شد در دو شرایط (با بازخورد بینایی و بدون بازخورد بینایی) روی سه سطح صفحۀ تعادل با ناپایداری متفاوت (سطوح 10، 8 و 6) بایستند. شاخص‌های تعادل (کلی، میانی جانبی و قدامی خلفی) از طریق دستگاه تعادل‌سنج بایودکس ثبت شد. مدت زمان هر آزمون 20 ثانیه و زمان استراحت بین آزمون‌ها 20 ثانیه بود. یافته‌ها نشان داد که با افزایش دشواری تکلیف تعادلی شاخص میانی- جانبی تعادل (02/0 =P) افزایش معنادار داشت و در شرایط با بازخورد بینایی در مقایسه با شرایط بدون بازخورد بینایی، شاخص‌های کلی (001/0 =P)، قدامی- خلفی (01/0 =P) و میانی- جانبی تعادل (01/0 =P) کاهش معنادار داشت. به‌طور کلی نتایج نشان داد که افزایش دشواری تکلیف تعادلی نوسان قامت را افزایش می‌دهد و ارائۀ بازخورد بینایی می‌تواند نوسان قامت را کم کند و تعادل را بهبود بخشد.
کلیدواژه‌ها
عنوان مقاله [English]
The Effect of Task Difficulty and Visual Feedback on Balance in Elderly Women
نویسندگان [English]
- Ali Farsi 1
- Hadis Kavianpoor 2
1 Associate Professor, Department of Motor Behavior, Faculty of Physical Education and Sport Sciences, Shahid Beheshti University, Teheran, Iran
2 M.Sc. of Motor Behavior, Shahid Beheshti University, Tehran, Iran
چکیده [English]
The purpose of present study was to determine the effect of different levels of balance task difficulty and visual feedback on balance in elderly women. Fourteen healthy elderly women (mean age 57/65 yr) were selected voluntarily. Participants were asked to stand still on a stability platform under each of two conditions (with visual feedback and without visual feedback) in three levels of difficulty (6, 8, 10). Stability index scores (Overall, Anterior- Posterior and Medial- Lateral) were calculated by Biodex Balance System. Duration of each test was 20 seconds and rest times were 20 seconds. Results showed that with increasing task difficulty, score of Medial- Lateral balance (p= 0/02) increased significantly. In addition, There was a significant reduction in the scores of Overall balance (p= 0/001), anterior - posterior balance (p= 0/01) and medial - lateral balance (p= 0/01) in visual feedback condition compared with without feedback condition. Overall, the results of this study showed that increasing task difficulty increases postural sway and availability of visual feedback can improve balance and reduce the postural sway.
کلیدواژه‌ها [English]
- visual feedback
- stability index
- Elderly
- task difficulty
- postural sway
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