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اثر تعاملی مکملهای الکارنیتین و کافئین برمتغیرهای فیزیولوژیک معادل با آستانه بیهوازی در کاراته کاران مرد نخبه | ||
پژوهشنامه فیزیولوژی ورزشی کاربردی | ||
مقاله 2، دوره 16، شماره 31، شهریور 1399، صفحه 31-44 اصل مقاله (999.31 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22080/jaep.2020.17336.1910 | ||
نویسندگان | ||
زهرا طهماسبی آبدر1؛ روح ا... نیکویی* 2؛ داریوش مفلحی3 | ||
1کارشناس ارشد، گروه فیزیولوژی ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه شهید باهنر کرمان،کرمان، ایران | ||
2دانشیار گروه فیزیولوژی ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه شهید باهنر کرمان، کرمان، ایران | ||
3استادیار گروه فیزیولوژی ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه شهید باهنر کرمان، کرمان، ایرانن | ||
تاریخ دریافت: 02 آبان 1398، تاریخ بازنگری: 09 دی 1398، تاریخ پذیرش: 16 دی 1398 | ||
چکیده | ||
سابقه و هدف: بهینه سازی اثرات مفید مکملهای اگزوژنیک در بهبود عملکرد ورزشی از اهمیت خاصی برخوردار است. هدف تحقیق حاضر بررسی اثر تعاملی مکملهای الکارنیتین و کافئین بر متغیرهای فیزیولوژیک معادل با آستانه بی هوازی در مردان کاراته کار استان کرمان بود. مواد و روشها: پانزده کاراته کار نخبه در 4 جلسه مجزا و با فاصله زمانی یک هفته، یک آزمون فزاینده استاندارد را بعد از مصرف دارونما (250 میلی گرم لاکتوز)، کافئین (5 میلی گرم بر کیلوگرم وزن بدن)، الکارنیتین (3گرم) و مصرف همزمان کافئین و الکارنیتین (3 گرم، 5 میلی گرم برکیلوگرم وزن بدن) انجام دادند. نمونه خونی قبل از مصرف مکمل و بلافاصله بعد از اتمام هر آزمون جمع آوری شد. گازهای تنفسی در خلال آزمون اندازهگیری شد. متغیرهای ضربان قلب، اکسیژن مصرفی و بار کاری معادل با آن استخراج و بوسیله آزمون تحلیل واریانس مکرر بین کوششها مقایسه شدند. یافته ها: سطوح اسید چرب آزاد پلاسما (FFA) در انتهای آزمون و میزان تغییرات آن در حین تمرین در کوشش کافئین و ترکیبی نسبت به کوشش کنترل بطور معنیدار بالاتر بود (هر دو 05/0>p)، ولی سطوح تری گلیسرید پلاسما بین کوششها تفاوتی نداشت. بارکاری و اکسیژن مصرفی معادل با آستانه بیهوازی نیز در کوشش کافئین و ترکیبی نسبت به کوشش کنترل بطور معنیدار بالاتر بود (همه 05/0>p). سایر متغیرهای عملکردی تفاوتی بین کوششها را نشان نداد. مصرف ترکیبی کافئین و ال کارنیتین سبب بهبود اکسیژن مصرفی معادل با آستانه بیهوازی (11 در یرایر 17 درصد) و بار کاری معادل با آستانه بی هوازی (12در برابر 21 درصد) در مقایسه با مصرف کافئین به تنهایی شد، هر چند اختلاف متغیرها بین دو گروه معنیدار نبود. نتیجهگیری: مصرف کافئین میتواند با افزایش سطوح اسیدهای چرب سبب بهبود عملکرد استقامتی شود و این اثر ممکن است با مصرف توامان الکارنیتین تشدید گردد. | ||
کلیدواژهها | ||
آستانه بیهوازی؛ مکمل کافئین؛ عملکرد استقامتی؛ مکمل الکارنیتین | ||
عنوان مقاله [English] | ||
Synergistic Effect of L-Carnitine and Caffeine Supplements on Physiological Variables Corresponding to Anaerobic Threshold in Elite Male Karate | ||
نویسندگان [English] | ||
Zahra Tahmasebi -Abdar1؛ Rohollah Nikooie2؛ Darioush Moflehi3 | ||
1Department of Exercise Physiology, Faculty of Physical Education and Sport Science, Shahid Bahonar University of Kerman, Kerman, Iran | ||
2Physiology, Faculty of Physical Education and Sport Science, Shahid Bahonar University of Kerman, Kerman, Iran | ||
3Department Of Exercise Physiology, Faculty of Physical Education and Sport Science, Shahid Bahonar University of Kerman, Kerman, Iran. | ||
چکیده [English] | ||
Background and Purpose: Optimization of positive effects of exogenous supplements on sports performance is very important. The aim of this study was to investigate the Synergistic effectof L-carnitine and caffeine supplements on physiological variables corresponding to anaerobic threshold (AT) in Kerman karate men. Methodology: Fifteen elite karate athletes performed a progressive standard test following placebo (250 mg Lactose), caffeine (5 mg/kg), L-carnitine (3 g), and caffeine and L-carnitine (5 mg/kg, 3 g) consumption in four sessions separated by one-week intervals. Blood sample was collected before supplement consumption and immediately after exercise. Respiratory gases were measured throughout the test. Heart rate and oxygen consumption corresponding to AT were determined, and compared among trials by repeated measures analysis of variance. Results: End test values of plasma fatty acid (FFA) and its changes during exercise in caffeine and combined trial were significantly higher than those values in the control trial (both p <0.05), but plasma triglyceride levels were not significantly different between trials. The workload and oxygen (O2) corresponding to AT were significantly higher in the caffeine and combined trials compared to the values found in the control trials (all p <0.05). There was no significant difference regarding other variables among trials. Simultaneous consumption of caffeine and L-carnitine improved the values of O2 (11 vs. 17%) and workload (12 vs. 21) corresponding to AT compared to caffeine consumption alone, although there was no significant difference between groups. Conclusion: Caffeine consumption can improve endurance performance through increasing fatty acid availability and this effect could be exacerbated by simultaneous consumption of L-carnitine. | ||
کلیدواژهها [English] | ||
Anaerobic threshold, Caffeine supplement, Endurance performance, L-Carnitine supplement | ||
مراجع | ||
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