بررسی توان آلفا در پرتاب‌های آزاد موفق و ناموفق بسکتبالیست‌های نخبه و نوآموز

کشوری, فاطمه; فارسی, علیرضا; عبدلی, بهروز

doi:10.22059/jsmdl.2023.358755.1718

نوع مقاله : مقاله پژوهشی Released under CC BY-NC 4.0 license I Open Access I

نویسندگان

¹ گروه علوم رفتاری، شناختی و فناوری ورزشی، دانشکدة علوم ورزشی و تندرستی، دانشگاه شهید بهشتی، تهران ، ایران.

² گروه علوم رفتاری ، شناختی و فناوری ورزشی، دانشکدة علوم ورزشی و تندرستی، دانشگاه شهید بهشتی، تهران، ایران.

³ گروه علوم رفتاری،شناختی و فناوری ورزشی، دانشکدة علوم ورزشی و تندرستی، دانشگاه شهید بهشتی، تهران ، ایران.

https://doi.org/10.22059/jsmdl.2023.358755.1718

چکیده

مقدمه: هدف از تحقیق حاضر، بررسی توان آلفا در پرتاب‌های آزاد موفق و ناموفق بسکتبالیست‌های نخبه و نوآموز بود.
روش پژوهش: پژوهش حاضر نیمه‌تجربی بود و در قالب طرح سری‌های زمانی اجرا شد. دو گروه نخبه (10 آزمودنی با میانگین سنی 1/34 ± 22/25 سال) و نوآموز (10 آزمودنی با میانگین سنی 1/80 ± 22/55 سال) به‌صورت داوطلبانه مشارکت داشتند. داده‌ها با استفاده از 28 الکترود از یک دستگاه 32 کانالة بی‌سیم اندازه‌گیری و با استفاده از آزمون تحلیل واریانس با اندازه‌گیری مکرر تحلیل شد (0/05 ≥P).
یافته‌ها: توان آلفای گروه نخبه بالاتر از گروه نوآموز بود (0/001=P). پرتاب‌های موفق نسبت به پرتاب‌های ناموفق توان آلفای کمتری را نشان داد (0/006=P). در مقایسۀ دو گروه، توان آلفا در پرتاب‌های ناموفق گروه نخبه نسبت به پرتاب‌های موفق آن‌ها بیشتر بود (0/001=P)، اما بین توان آلفای پرتاب‌های موفق و ناموفق گروه نوآموز تفاوتی مشاهده نشد (0/584=P). توان آلفا در زمان اجرای تکلیف پرتاب آزاد بالاتر از زمان‌های قبل بود (0/005>P)، اما بین زمان اول و دوم تفاوتی نبود (0/001=P). نتایج نشان داد که گروه نخبه فعالیت قشری بالاتری نسبت به گروه نوآموز در همۀ الکترودها داشتند (0/001>P).
نتیجه‌گیری: یافته‌ها نشان می‌دهد که گروه نخبه با مهار اطلاعات نامربوط تکلیف را با پیچیدگی قشری کمتری اجرا کردند. همچنین کاهش توان آلفا در پرتاب‌های موفق نشان‌دهندة افزایش فعال‌سازی قشر مغز و افزایش تمرکز است تا در نهایت تکلیف با منابع عصبی کمتری اجرا شود.

کلیدواژه‌ها

عنوان مقاله [English]

Investigating the Alpha Power in Successful and Unsuccessful Free Throws of Elite and Novice Basketball Players

نویسندگان [English]

Fatemeh Keshvari ¹
Alireza Farsi ²
Behrooz Abdoli ³

¹ -Department of Cognitive and Behavioral Sciences and Technology in Sport. Faculty of Sport Sciences and Health, Shahid Beheshti University, Tehran, Iran.

² Department of Cognitive and Behavioral Sciences and Technology in Sport. Faculty of Sport Sciences and Health, Shahid Beheshti University , Tehran, Iran .

³ Department of Cognitive and Behavioral Sciences and Technology in Sport. Faculty of Sport Sciences and Health, Shahid Beheshti University, Tehran , Iran.

چکیده [English]

Introduction: This study aimed to investigate alpha power in successful and unsuccessful free throws of elite and novice basketball players.
Methods: The current research was quasi-experimental and was implemented in a time series design. Two Elite (10 participants with a mean age of 22.25 ± 1.34) and Novice (10 participants with a mean age of 22.55 ± 1.80) groups participated voluntarily. The data were measured using 28 electrodes from a 32-channel wireless device and were analyzed using the repeated measures analysis of variance test (p≥0.05).
Results: The alpha power of the elite group was higher than the novice group (P=0.001). The successful throws showed lower alpha power than unsuccessful throws (P=0.006). In the comparison of the two groups, the alpha power in the unsuccessful throws of the elite group was higher than in their successful throws (p=0.001), but no difference was observed between the alpha power of the successful and unsuccessful throws of the novice group (p=0.584). The alpha power during the execution time of the free throw task was higher than the pre-execution time (p<0.005), but there was no difference between the first and second pre-execution times (p=1.000). The results of the present study showed that the elite group had higher cortical activity than the novice group in all electrodes (p<0.001).
Conclusion: The findings show that the elite group performed the task with less cortical complexity by inhibiting irrelevant information. In addition, the decrease in alpha power in successful throws indicates an increase in activation of cerebral cortex and an increase in concentration, so that the task can be performed with fewer neural resources.

کلیدواژه‌ها [English]

Electroencephalography
Alpha Power
Elite
Educated

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رشد و یادگیری حرکتی ورزشی

بررسی توان آلفا در پرتاب‌های آزاد موفق و ناموفق بسکتبالیست‌های نخبه و نوآموز

مراجع

مراجع

دوره 15، شماره 4
دی 1402
صفحه 37-53

بررسی توان آلفا در پرتاب‌های آزاد موفق و ناموفق بسکتبالیست‌های نخبه و نوآموز

مراجع

مراجع

دوره 15، شماره 4دی 1402صفحه 37-53

دوره 15، شماره 4
دی 1402
صفحه 37-53