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تأثیر مکمّلگیری کوتاهمدّت کراتین و کراتین همراه با کربوهیدرات بر عملکرد بیهوازی فوتبالیستهای جوان | ||
پژوهشنامه فیزیولوژی ورزشی کاربردی | ||
مقاله 2، دوره 4، شماره 7، تیر 1387، صفحه 11-22 اصل مقاله (217.41 K) | ||
نوع مقاله: مقاله پژوهشی | ||
نویسندگان | ||
ضیاء فلاحمحمّدی1؛ شادمهر میردار1؛ امیر اسماعیلی2؛ ملیحه قلی نژاد3 | ||
1استادیار دانشگاه مازندران | ||
2کارشناسی ارشد دانشگاه مازندران | ||
3کارشناسی صنایع غذایی دانشگاه آزاد اسلامی واحد قوچان | ||
تاریخ دریافت: 10 بهمن 1386، تاریخ بازنگری: 29 آبان 1395، تاریخ پذیرش: 04 خرداد 1387 | ||
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 | ||
مکمّلگیری کوتاهمدّت کراتین+کربوهیدرات؛ RAST؛ CMJT بازیکنان فوتبال | ||
عنوان مقاله [English] | ||
The Effect of Acute Creatine and Combined Creatine and Carbohydrate Supplementation on Anaerobic Performance of Soccer Players | ||
نویسندگان [English] | ||
Zia Fallah Mohammadi1؛ Shadmehr Mirdar Harijani1؛ Amir Esmaeeli2؛ Malihe Gholinejad3 | ||
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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