تأثیر مکمّل‌گیری کوتاه‌مدّت کراتین و کراتین همراه با کربوهیدرات بر عملکرد بی‌هوازی فوتبالیست‌های جوان

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار دانشگاه مازندران

2 کارشناسی ارشد دانشگاه مازندران

3 کارشناسی صنایع غذایی دانشگاه آزاد اسلامی واحد قوچان

چکیده

هدف از پژوهش حاضر تعیین تأثیر مکمّل­گیری کوتاه‌مدّت کراتین مونوهیدرات به صورت مجزّا و همراه با کربوهیدرات بر عملکرد بی­هوازی بازیکنان جوان فوتبال بود. آزمودنی‌های پژوهش را، 21 بازیکن رده سنّی زیر بیست و یک سال با میانگین سنّی 61/1±19 سال تشکیل می­دادند که به صورت داوطلبانه در این پژوهش شرکت کردند. آزمودنی‌ها پس از اندازه­گیری ترکیب بدنی آزمون پرش با افت ­اوّلیّه (CMJT) و RAST را انجام دادند. سپس به صورت تصادفی به سه گروه 7 نفره؛ کراتین+کربوهیدرات (5گرم کراتین + 25 گرم کربوهیدرات،4 وعده در روز)؛ کراتین (5 گرم کراتین،4 وعده در روز) و دارونما تقسیم شدند. مکمّل­گیری به روش دو سوکور و به مدّت پنج روز متوالی انجام شد و پس از آن آزمون­گیری مشابه با پیش‌آزمون تکرار گردید. برای بررسی تغییرات درون‌گروهی از آزمونt  هم‌بسته و برای تغییرات بین­گروهی از آنالیز واریانس یک‌طرفه­، در سطح معنی‌داری 05/0 p≤ استفاده شد. نتایج درون­گروهی حاکی از افزایش معنی­دار در حدِّ اکثر و میانگین­ توان ­بی­هوازی و عدم تغییر معنی­دار در شاخص ­خستگی و ارتفاع CMJT در دو گروه کراتین + کربوهیدرات و کراتین بود. علاوه بر این یافته­­های بین­گروهی تفاوت معنی­داری بین تغییرات سه گروه در متغیّر­های حدِّ اکثر و میانگین ­توان بی­هوازی، شاخص­خستگی وCMJT نشان نداد. به طور کلّی با توجّه به یافته­­های پژوهش می­توان چنین نتیجه­گیری کرد که اگرچه مصرف کراتین همراه با کربوهیدرات نسبت به کراتین­ تنها، اختلاف معنی­داری در عملکردهای بی­هوازی نداشت، بهبودهای اندکی علی­رغم افزایش وزن بدن در دو گروه کراتین مشاهده شد که ممکن است نقش تعیین‌کننده­ای در عملکرد ورزشی داشته باشد.

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of‌‌ Acute Creatine and Combined Creatine and Carbohydrate Supplementation on Anaerobic Performance of Soccer Players

نویسندگان [English]

  • Zia Fallah Mohammadi 1
  • Shadmehr Mirdar Harijani 1
  • Amir Esmaeeli 2
  • Malihe Gholinejad 3
چکیده [English]

The purpose of this study was to examine the effects of acute creatine-monohydrate (CR) and creatine plus carbohydrate (CR+CHO) supplementation on anaerobic performance in young soccer players. Twenty one young male soccer players (19±1.61 years) participated in the study who were matched and assigned to 3 random trials: CR+CHO (N=7, 4×­5 g/d of creatine + 25 g CHO) or CR­­­ (N=7, ­ 4×5 g/d of creatine) or placebo for 5 days using a double-blind research design. Before and after the supplementation protocol, subjects performed a counter-movement jump test (CMJT), and Running-based Anaerobic Sprint Test (RAST) after the measurement of body composition. T-test and one-way ANOVA were used to establish if any significant differences existed within and between groups at P ≤ 0.05 respectively. Maximum and average power and body mass improved significantly in the CR+CHO and CR groups, whereas there was no significant change in CMJT and fatigue index at post-test. Furthermore, there were no between group differences in maximum and average power; CMJT and fatigue index in CR+CHO and CR groups compared with placebo group. In conclusion, our findings demonstrated that although performance of an acute creatine loading together with CHO supplementation did not significantly improve anaerobic performances of soccer players but in spite of increase body mass, certain improvements were detected in Creatine groups which might have had an important role in the game results.

کلیدواژه‌ها [English]

  • Acute creatine+carbohydrate Supplementation
  • RAST
  • CMJT
  • Soccer Players
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