نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار رفتارحرکتی، دانشگاه بین‌المللی امام خمینی (ره)
2 دانشیار فیزیولوژی ورزشی، دانشگاه بین‌المللی امام خمینی (ره)
چکیده
هدف از این پژوهش تأثیریک دوره تمرینات هوازی بر میزان ﻋﺎﻣﻞ ﻧﻮروﺗﺮوﻓﻴﻚ ﻣﺸﺘﻖ از ﻣﻐﺰ (BDNF) و میزان توجه و تمرکز زنان سالمند بود. در این پژوهش نیمه‌تجربی، 19 زن سالمند با میانگین سن 2/4±3/58 به‌طور تصادفی به دو گروه تجربی (10=n) و کنترل(9=n) تقسیم شدند. از همة آزمودنی‌ها 24 ساعت قبل از شروع تمرین و 24 ساعت پس از پایان دورة آزمون، به‌صورت ناشتا خون‌گرفته شد. داده‌ها با استفاده از آزمون توجه و تمرکز وینا (COG) جمعآوری شدند. مؤلفه‌های آزمون شامل تعداد انتخابهای صحیح، تعداد انصراف صحیح (شاخص سرعت پردازش در توجه)، میانگین زمان انتخاب صحیح (شاخص تمرکز) و میانگین زمان انصراف صحیح (توجه انتخابی) به آزمون‌ها بود. گروه تجربی به مدت هشت هفته، هر هفته سه جلسه تمرین هوازی به‌مدت 45-30 دقیقه با شدت 55-40 درصد ضربان قلب بیشینه تمرینات هوازی داشتند. گروه تمرینی در قیاس با گروه مرجع (نورم)، رتبة درصدی 87 را در پسآزمون احراز کرد. این در حالی بود که گروه کنترل رتبة درصدی 34 را احراز کرد. نتایج پژوهش نشان داد شاخصهای سرعت پردازش (P=0.001)، توجه انتخابی(P=0.001) و شاخص تمرکز (P=0.001) بهبود معنیداری یافت. ازآنجاکه ارتباط مستقیمی بین سطح BDNF و تمرینات هوازی وجود دارد و از طرفی تأثیر BDNF بر ویژگی‌های شناختی روشن است، بنابراین تمرین هوازی با شدت متوسط می‌تواند زمینة بهبود ویژگی‌های روانی حرکتی همچون توجه و تمرکز را مهیا کند.
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
The Effect of Aerobic Exercise on Brain-derived Neurotrophic Factor and Attention of Elderly Females
نویسندگان [English]
- Morteza Taheri 1
- Khadijeh Irandoust 2
1 Assistant Professor of Motor Behavior, Imam Khomeini International University
2 Associate Professor of Exercise Physiology, Imam Khomeini International University
چکیده [English]
One of the main concerns of aged people is the attention attenuation in the aging period. Thus, the purpose of this study was to investigate the effect of aerobic exercise on Brain-derived Neurotrophic Factor (BDNF) and attention/ concentration of elderly females. It was a semi experimental study with 41 elderly subjects with mean age of 66±3.2yr whom were randomly assigned into either an exercise (EG, n=21) or a control group (CG, n=20). fasting blood test was taken 24 hours prior to experiment and 24 hours after the end of tests. COG test in Viena system was used to collect data.The aerobic training group trained for 8 weeks, 3 sessions per week, 30 to 45 hours in each session. The aerobic training performed with 40% to 55% of maximum heart rate. Training group had rank percentile of 87 compared to reference group while it was 34 for control group. The results suggested that speed processing(P=0.001)selective attention (P=0.001)and concentration (P=0.001) were significantly improved in the training group. Since a direct relationship has been foun between BDNF and Aerobic Excercises, besides, the positive eddefct of BDNF on cognitive capacities is well proven, therefore, a mild type of aerobic exercise colud imrove the psychomotor performance.
کلیدواژه‌ها [English]
- Elderly
- BDNF
- Attention
- Concentration
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