اثر مصرف حاد آب چغندر قرمز بر توان هوازی و بی‌هوازی دختران کاراته‌کا غیرحرفه‌ای

نوع مقاله : علمی - پژوهشی

نویسندگان

گروه علوم ورزشی، دانشکدة علوم انسانی، دانشگاه سمنان، سمنان، ایران

چکیده

زمینه و هدف: آب چغندر قرمز منبع غنی از نیترات است. اکسید نیتریک توانایی تحریک گشاد شدن عروق را دارد که سبب افزایش جریان خون به عضله می‌شود. با توجه به درگیر بودن دستگاه هوازی و بی‌هوازی در ورزش کاراته، هدف از پژوهش حاضر، بررسی تأثیر آب چغندر قرمز بر توان هوازی و بی‌هوازی دختران کاراته‌کا بود.
مواد و روش‌ها: بدین‌منظور 10 دختر کاراته‌کا سطح باشگاهی در ردة کمربند مشکی دان دو و سه  داوطلبانه در یک مطالعة متقاطع، تصادفی و دوسوکور، بررسی شدند. آزمودنی‌ها رأس ساعت 7:30 دقیقة صبح در محل سالن ورزشی حضور پیدا کردند و پس از مصرف آب چغندر قرمز (100 میلی‌لیتر) یا دارونما (آب زغال‌اخته)، 90 دقیقه استراحت کرده و رأس ساعت 9 صبح در آزمون شرکت کردند. ابتدا 10 دقیقه گرم کردن پویا شامل راه رفتن و حرکات کششی انجام گرفت، سپس آزمون 9×4، آزمون رست و در انتها آزمون هوازی ویژة کاراته اجرا شد. در این آزمون هوازی آزمودنی‌ها ضربات متوالی به کیسة بوکس را در حالت گارد می‌زدند. در زمان بازیافت مانند یک درگیری واقعی در حال حرکت بودند. آزمون زمانی پایان می‌یافت که آزمودنی دیگر قادر به ادامة ضربات نبود. در این صورت زمان ثابت نگه داشته شده و عدد به‌دست‌آمده زمان خستگی و مرحلة آزمون ثبت شد. بین هر کدام از آزمون‌ها سه دقیقه استراحت فعال لحاظ شد. پس از گذشت یک هفته گروه‌های آزمودنی جابه‌جا شدند و مجدداً آزمون‌های مذکور انجام گرفت. تجزیه‌وتحلیل آماری با استفاده از آزمون t زوجی و نرم‌افزار SPSS نسخة 26 گزارش شد.
نتایج: نتایج نشان داد که با مصرف آب چغندر قرمز در مقایسه با دارونما توان بیشینه (014/0 P=)، حداقل توان (025/0 P=)، میانگین توان (011/0 P=)، شاخص خستگی (022/0 P=) و شاخص افت سرعت (020/0 P=) در آزمون RAST به‌طور معناداری بهبود یافته است. همچنین کاهش معناداری در زمان آزمون چابکی 9×4 (039/0 P=) مشاهده شد. اما تفاوت معناداری در آزمون هوازی ویژة کاراته (099/0 P=) و میزان درک فشار (685/0 P=) مشاهده نشد.
نتیجه‌گیری: با توجه به نتایج پژوهش حاضر مصرف آب چغندر قرمز ممکن است در بهبود عملکرد بی‌هوازی و چابکی کاراته‌کاها مؤثر باشد، هرچند مقدار تغییر در عملکرد هوازی در آزمون ویژة کاراته، چشمگیر نبود. با توجه به نتایج به‌نظر می‌رسد مصرف آب چغندر قرمز می‌تواند برای این ورزشکاران مفید باشد.

کلیدواژه‌ها

عنوان مقاله [English]

The effect of acute consumption of red beet juice on aerobic and anaerobic power of amateur karate girls

نویسندگان [English]

  • Elahe sadat Hashemi fard
  • Mohsen Ebrahimi
Department of Sport Sciences, Faculty of Humanities, Semnan University, Semnan, Iran
چکیده [English]

Background and Purpose: Red beet juice is a rich source of nitrate. Nitric oxide has the ability to stimulate vasodilation; Which increases blood flow to the muscle. Due to the involvement of aerobic and anaerobic systems in karate, the aim of this study was to investigate the effect of red beet juice on aerobic and anaerobic power of karate girls.
Materials and Methods: For this purpose, 10 club-level female karate players in the black belt category, two and three, were voluntarily studied in a cross-sectional, randomized, double-blind study. Subjects arrived at the gym at 7:30 a.m. and rested for 90 minutes after consuming red beetroot juice (100 ml) or placebo (blueberry juice) and taking the test at 9:00 a.m. First, 10 minutes of dynamic warm-up including walking and stretching movements were performed, then 4×9 test, RAST test and finally karate aerobic test was performed. In this aerobic test, the subjects guarded the punching bag consecutively. They were moving like a real combat during the recovery. The test ended when the subject was no longer able to continue the blows. In this case, the time was kept constant and the obtained number was recorded as fatigue time and test stage. Three minutes of active rest were determined between each test. After one week, the groups of subjects were transferred and the mentioned tests were performed again. Statistical analysis was reported using paired t-test and SPSS software version 26.
Results: The results showed that with consumption of red beet juice compared to placebo maximum power (P = 0.014), minimum power (P = 0.025), average power (P = 0.011), fatigue index (P = 0.022) and Speed drop index (P = 0.020) improved significantly in RAST test. There was also a significant decrease in agility test time (P = 0.039). But there was no significant difference in karate specific aerobic test (P = 0.099) and perceived exertion (P = 0.685).
Conclusion: According to the results of the present study, consumption of red beet juice is effective in anaerobic performance and agility of karateka. But the amount of change in aerobic performance in the special karate test was not significant. Therefore, according to the results, it seems that consuming red beet juice can be useful for these athletes.

کلیدواژه‌ها [English]

  • Red beet juice
  • Nitric oxide
  • Fitness index
  • Karate

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سابقه مقاله

  • تاریخ دریافت: 04 مهر 1400
  • تاریخ بازنگری: 11 دی 1400
  • تاریخ پذیرش: 20 بهمن 1400
  • تاریخ اولین انتشار: 01 تیر 1401
  • تاریخ انتشار: 01 تیر 1401

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