دشواری پیش‌بینی ضربات پای چپ حریف در برابر پای راست در تکواندو

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد، دانشکدة علوم ورزشی، دانشگاه اصفهان، ‌اصفهان، ‌ایران

2 دانشیار، دانشکدة علوم ورزشی، دانشگاه اصفهان، ‌اصفهان، ‌ایران

10.22059/jmlm.2019.282536.1451

چکیده

هدف این پژوهش بررسی قدرت پیش‌بینی تکواندوکاران در زمان رویارویی با ضربات پای راست و چپ بود. بدین‌منظور، برای تکواندوکاران برتر (تعداد= 40؛ سن = 12/5± 93/20 سال، سابقة مبارزة کیوروگی در تکواندو = 49/4 ± 58/7 سال) شبیه‌سازی‌های ویدئویی کاملاً همسانی از ضربات پای چپ و راست نمایش داده شد. پخش این ویدئوها در چند نقطة مختلف‌-از آغاز تا تکمیل ضربات- متوقف شد. از شرکت‌کنندگان‌ خواسته شد نوع ضربه (حمله‌هایی با پای جلو و پشت به‌سوی سر یا تنه) را پیش‌بینی کنند. نتایج نشان داد پیش‌بینی ضربه‌های پای راست به میزان معناداری دقیق‌تر از ضربات پای چپ بوده است. آشکارترین زمان برای مشاهدة اثر برتری پا هنگامی بود که فیلم ضربات 120 هزارم‌ثانیه پیش‌ از تکمیل ضربات متوقف شده بود. بنابراین، به‌نظر می‌رسد برتری پای حریف بر پیش‌بینی بینایی نوع عمل اثرگذار بوده است. درصد پیش‌بینی‌های درست بیانگر این است که شاید تکواندوکارهای کیورگی هنگامی‌که با ضربات پای چپ روبه‌رو شده‌اند، یک راهبرد جست‌وجوی بینایی بهینه اتخاذ نکرده‌اند و این وضعیت سبب شده است بیشتر موارد در شناسایی نشانه‌های سینماتیکی معتبر و مربوط به حرکت، پیش از تکمیل ضربات پای چپ (نزدیک 120 هزارم‌ثانیه یا بیشتر پیش از پایان ضربه) ناتوان باشند. به‌نظر می‌رسد ضعف توانایی بازشناسی نوع ضربات پای چپ در برابر پای راست حریف به آشنایی کمتر مشاهده‌گر با حرکات چپ برترها مربوط باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Difficulty of Anticipating Left- vs. Right-footed Opponents' Kicks in Taekwondo

نویسندگان [English]

  • Shaghayegh Mohammadi 1
  • Hamid Salehi 2
1 Faculty of Sport Sciences, University of Isfahan
2 Faculty of Sport Sciences, University of Isfahan
چکیده [English]

The purpose of this investigation was to examine the anticipation of taekwondo athletes when facing right- and left-footed kicks. Expert taekwondo athletes (n = 40; age = 20.935.12 years; Taekwondo Kyorugi competition experience = 7.584.49years) were shown identical video simulations of right-footed and left-footed chagi kicks. The videos were temporally paused at five different time occlusion points from the start to the end of the kicks. The participants were required to make prediction of kick types (front vs. back leg to head or trunk of opponent in kick attacks). The results indicated that anticipation of right-footed kicks was significantly more accurate than that of left-footed kicks. The footedness effect was found to be most pronounced when kicks videos were paused at 120 ms prior to the kick completion. Thus, the opponent’s footedness seems to affect visual anticipation of the type of an action. Mean percentages of correct predictions suggest that kyorugi taekwondo players may not adopt an optimal visual search strategy when facing left-footed kicks, resulting in fails in the detection of anticipation-relevant kinematic cues before the end of left-footed kicks in most instances (i.e., about 120 ms and more before the kick completion). It seems that the lower ability of recognizing the type of left- vs. right-footed opponents' kicks were due to the observers’ reduced perceptual awareness with left-footed actions

کلیدواژه‌ها [English]

  • "temporal occlusion"
  • "visual anticipation"
  • "laterality"
  • "interactive sports"
  • "Taekwondo"
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