تأثیر حاد مصرف مکمل کافئین و ال‌کارنیتین بر هزینه سوخت و سازی و اکسایش سوبسترا هنگام و پس از فعالیت تناوبی شدید در دانشجویان پسر فعال

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد علوم ورزشی، دانشکده علوم ورزشی، دانشگاه بیرجند، بیرجند، ایران

2 استادیار فیزیولوژی ورزش، دانشکده علوم ورزشی، دانشگاه بیرجند، بیرجند، ایران(نویسنده مسئول)

3 استاد فیزیولوژی ورزش، دانشکده علوم ورزشی، دانشگاه بیرجند، بیرجند، ایران

4 دانشجوی کارشناسی ارشد علوم ورزشی، دانشکده علوم ورزشی، دانشگاه بیرجند، بیرجند، ایران

چکیده

مقدمه
با توجه به نقش فعالیت تناوبی سرعتی و مصرف مکمل­های حاوی ترکیبات فعال زیستی در بهبود سوخت و ساز، هدف از تحقیق حاضر بررسی اثر حاد مصرف مکمل­های کافئین، ال­کارنیتین، کافئین-ال­کارنیتین (ترکیبی) بر روی هزینه سوخت وسازی و اکسایش سوبسترا هنگام و پس از فعالیت تناوبی سرعتی بود.
روش کار: 10 دانشجوی پسر فعال در طرح متقاطع دو سوکور تصادفی در چهار حالت مصرف: - دارونما (3 میلی­گرم/کیلوگرم گلوکز و فروکتوز)؛ - کافئین (6 میلی­گرم/کیلوگرم)؛ - ال­کارنیتین (13 میلی­گرم/کیلوگرم)؛ و - ترکیبی (به ترتیب 6 و 13 میلی­گرم/کیلوگرم) قرار گرفتند. در 4 حالت، آزمودنی­ها یک ساعت پس از مصرف مکمل به فعالیت ورزشی (چهار آزمون وینگیت 30­ ثانیه (بار کاری 75 گرم/کیلوگرم) با استراحت 5 دقیقه) پرداختند. گازهای تنفسی آزمودنی­ها قبل، هنگام و 30 دقیقه بعد از فعالیت، جهت محاسبه هزینه سوخت و سازی (هزینه انرژی، اکسیژن مصرفی) و اکسایش سوبسترا (نسبت تبادل تنفسی (RER)، میزان مصرف چربی) تجزیه و تحلیل شد. تحلیل آماری با آزمون آنوای یک طرفه انجام شد.
نتایج: براساس نتایج، اختلاف میانگین پس آزمون-پیش آزمون فقط در RER (048/0=P)، میزان مصرف چربی (036/0=P) و ضربان قلب (04/0=P) تفاوت معنی­داری را نشان داد. بعلاوه، مصرف کافئین در مقایسه با ال-کارنیتین (015/0P=) و دارونما (042/0P=) با کاهش معنی­دار RER در دوره ریکاوری همراه بود. همچنین، مصرف کافئین در مقایسه با ال-کارنیتین (008/0P=)، مکمل ترکیبی (037/0P=) و دارونما  (032/0P=) باعث افزایش معنی­دار مصرف چربی در دوره ریکاوری شد. بنابراین استفاده از این دوز مصرفی کافئین همراه با فعالیت تناوبی سرعتی به افرادی توصیه می­شود که به دنبال کاهش یا مدیریت وزن می­باشند.

کلیدواژه‌ها

عنوان مقاله [English]

Acute effect of Caffeine and L-carnitine Supplement Administration on Metabolic Rate and Substrate Oxidation during and after high intensity intermittent exercise in active male students

نویسندگان [English]

  • Pooriya Soofinezhad 1
  • mohsen Mohammadnia Ahmadi 2
  • Mohammad Esmaeil Afzalpour 3
  • Seyede Fatemeh Rezaeian 4
1 MSc in Sport Sciences, Faculty of Sport Sciences, University of Birjand, Birjand, Iran
2 Associate Professor of Physiology of Sport, Faculty of Sport Sciences, University of Birjand, Birjand, Iran
3 Professor of Physiology of Sport, Faculty of Sport Sciences, University of Birjand, Birjand, Iran
4 MSc in Sport Sciences, Faculty of Sport Sciences, University of Birjand, Birjand, Iran
چکیده [English]

Introduction
High-Intensity intermittent exercise upon taking supplements containing bioactive compounds result in improving metabolism and fat oxidation .Thus, the aim of this study was to investigate the acute effect of caffeine, L-carnitine, caffeine-L-carnitine (combined) supplements on metabolic rate and substrate oxidation during and after high-Intensity intermittent exercise.
Material and Method
For this purpose, 10 male active students in a randomized double-blind crossover design in four modes of use: - Placebo (3 mg/kg. BW glucose and fructose); Caffeine (6 mg1/kg.BW); - L-carnitine (13 mg/kg. BW); and - caffeine-L-carnitine (6 and 13 mg/kg. BW, respectively.) In each of the four conditions, the subjects engaged in exercise (performing four 30-second Wingate tests (75 g/kg.BW) with a 5-minute rest interval) one hour after supplementation. Respiratory gases were measured before, during and 30 minutes after exercise and were analyzed to calculate metabolic rate (energy expenditure and oxygen consumption) and substrate oxidation (Respiratory Exchange Ratio (RER) and Fat oxidation). One-way ANOVA test was used for statistical analysis.
Results
The delta between the post-pre-test show significant change only in RER (P=0.048), Substrate oxidation (P=0.036) and heart rate (P=0.04). In addition, caffeine consumption was associated with a significant decrease in RER during the recovery period compared to L-carnitine (P=0.015) and placebo (P=0.042). Also, caffeine consumption in comparison with L-carnitine (P=0.008), combined supplement (P=0.037) and placebo (P=0.032) significantly increased Substrate oxidation in the recovery period. Conclusion
Therefore, it is recommended to participants who are looking to offer weight loss or management do high-intensity intermittent exercise upon taking caffeine.

کلیدواژه‌ها [English]

  • Caffeine supplement
  • L-carnitine supplement
  • Fat oxidation
  • Respiratory Exchange Ratio
  • Energy Expenditure

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مجله دانشکده پزشکی دانشگاه علوم پزشکی مشهد
دوره 65، شماره 6
بهمن و اسفند 1401
صفحه 2472-2485

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