نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری فیزیولوژی ورزشی، دانشکده علوم‌‌تربیتی و روان‌‌شناسی، دانشگاه محقّق اردبیلی، اردبیل، ایران.
2 دانشیار گروه فیزیولوژی ورزشی، دانشکده علوم‌‌تربیتی و روان‌‌شناسی، دانشگاه محقّق اردبیلی، اردبیل، ایران.
3 دانشیار گروه تربیت بدنی و علوم ورزشی، دانشکده علوم انسانی، دانشگاه کاشان، کاشان، ایران.
چکیده
زمینه و هدف: نقش محافظتی گلوتامین در برابر تجزیه پروتئین‌‌ها و اثر بالقوه آن در بازتوانی پس از فعالیت‌‌های درمانده‌‌ساز، به خوبی مشخص نشده است. هدف از این مطالعه، بررسی تاثیر مکمل‌‌دهی حاد گلوتامین قبل از یک فعالیت درمانده‌‌ساز بر میزان لاکتات خون و شاخص درد در ورزشکاران جوان بود. روش تحقیق: در این مطالعه نیمه تجربی دوسوکور، 16 ورزشکار مرد (سن: 77/1±87/21 سال، وزن: 02/6±65/72 کیلوگرم، نمایه توده بدن: 75/1± 23 کیلوگرم برمترمربع) به‌‌صورت تصادفی در دو گروه مکمل گلوتامین (8=n) و دارونما (8=n) تقسیم شدند. گروه تجربی، 6/0 گرم مکمل گلوتامین همراه با 500 میلی‌لیتر آب، به ازای هر کیلوگرم از وزن بدن نیم ساعت قبل از فعالیت نوشیدند. گروه دارونما محلول دو درصد دکسترین را بدون گلوتامین مصرف نمودند. میزان لاکتات با استفاده از دستگاه لاکتومتر و شاخص درد با پرسشنامه مقیاس عددی درد (NPRS)، در فواصل زمانی قبل، بلافاصله، 30 دقیقه و 60 دقیقه پس از پروتکل درمانده‌‌ساز اندازه‌گیری شد. داده‌‌ها با استفاده از آزمون تحلیل واریانس با اندازه‌گیری مکرر و آزمون تعقیبی بونفرونی در سطح معنی داری 05/0>p مورد بررسی قرار گرفتند. یافته‌ها: سطح لاکتات خون و شاخص درد بلافاصله پس از فعالیت درمانده‌‌ساز در هر دو گروه به طور معنی‌داری افزایش یافت (05/0>p). در زمان 30 دقیقه پس از اتمام فعالیت، سطح لاکتات خون و شاخص درد نسبت به بلافاصله بعد از فعالیت، در هر دو گروه کاهش معنی‌داری داشت (05/0>p). روند کاهش سطح لاکتات و شاخص درد تا 60 دقیقه پس از اتمام فعالیت همچنان ادامه داشت، اما این کاهش در گروه مکمل گلوتامین بیشتر از گروه دارونما بود (05/0>p). همچنین تفاوت بین‌‌گروهی معنی‌داری در سطح لاکتات خون (30 و60 دقیقه) و شاخص درد (بلافاصله، 30 و60 دقیقه) بعد از فعالیت درمانده‌‌ساز وجود داشت (05/0>p). نتیجه‌گیری: پیشنهاد می‌شود ورزشکاران از مکمل گلوتامین، برای کاهش سطح لاکتات خون و شاخص درد قبل از اجرای فعالیت‌‌های درمانده‌‌ساز استفاده کنند.
کلیدواژه‌ها
عنوان مقاله [English]
The effect of acute glutamine supplementation before an exhaustive activity on blood lactate level and pain index in young athletes
نویسندگان [English]
- Hamed Ghiami taklimi 1
- Ameneh Pourrahim Ghouroghchi 2
- Mohammad Ebrahim Bahram 1
- Mohammad Javad Pourvaghar 3
1 PhD Student in Exercise Physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran.
2 Associate Professor, Department of Exercise Physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran.
3 Associate Professor, Department of Physical Education and Sport Sciences, Faculty of Humanities, University of Kashan, Kashan, Iran.
چکیده [English]
Background and Aim: The protective role of glutamine against protein breakdown and also its potential effect on rehabilitation after exhaustive activities is not well understood. The aim of this study was to investigate the effect of acute glutamine supplementation before an exhaustive activity on blood lactate levels and pain index in young athletes. Materials and Methods: In this quasi-experimental double-blind study, 16 male athletes (age: 21.87±1.77 years, weight: 72.65±6.02 kg, body mass index: 23±1.75 kg/m2) were randomly divided into two groups including glutamine (n= 8) and placebo (n= 8) groups. The experimental group consumed 0.6 g of glutamine supplement per kg in body weight with 500 ml of water half an hour before activity. Moreover, the placebo group used 2% dextrin solution without glutamine. Lactate level was measured using a lactometer and pain index was evaluated with the numerical pain raiting scale (NPRS) questionnaire before, immediately, 30 minutes and 60 minutes after an exhaustive protocol. Data were analyzed using repeated measures analysis of variance and Beferroni post hoc test was applied at the significance level of p<0.05. Results: Blood lactate level and pain index significantly increased after exhaustive activity in both groups (p<0.05). However, blood lactate levels and pain index were significantly lower 30 minutes after activity as compare of the initial phase after exercise in both groups (p<0.05). The decreasing process of lactate level and pain index continued up to 60 minutes after the end of activity, but this decrease was greater in the glutamine supplement than in the placebo group (p<0.05). There was also a significant difference between blood lactate levels (30 and 60 minutes) and pain index (immediately, 30 and 60 minutes) after the exhaustive activity (p<0.05). Conclusion: It is recommended that athletes can use glutamine supplementation to reduce blood lactate levels and pain index before their performing exhaustive activities.
کلیدواژه‌ها [English]
- Pain index
- Acute physical activity
- Blood lactate
- Glutamine
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