نوع مقاله : مقاله پژوهشی
نویسندگان
1 کارشناس ارشد گروه فیزیولوژی ورزشی، دانشکده علوم ورزشی، دانشگاه رازی، کرمانشاه، ایران.
2 دانشیار فیزیولوژی ورزش، دانشکده علوم ورزشی، دانشگاه رازی، کرمانشاه، ایران.
3 دانشیار گروه تربیت بدنی و علوم ورزشی، دانشکده علوم انسانی و اجتماعی، دانشگاه کردستان، ایران.
چکیده
زمینه و هدف: عصاره چای سبز به عنوان یک آنتی اکسیدان اثرگذار بر کاهش استرس اکسیداتیو ناشی از فعالیت مقاومتی معرفی شده است. هدف از این پژوهش بررسی اثر مکمل یاری کوتاه مدت عصاره چای سبز بر شاخص های منتخب اکسایشی و ضداکسایشی پس از فعالیت مقاومتی با دو نوع شدت متوسط و بالا در مردان تمرین کرده بود. روش تحقیق: تعداد 11 مرد کشتی گیر تمرین کرده با وزنه در یک طرح متقاطع دوسوکور کنترل شده با دارونما شامل چهار دوره مکمل یاری یک هفته ای با دارونما یا عصاره چای سبز با دوز مصرفی روزانه 900 میلیگرم شرکت کردند. آزمودنی ها دو وهله فعالیت مقاومتی با شدت متوسط و دو وهله فعالیت مقاومتی با شدت بالا را پس از مصرف مکمل و یا دارونما انجام دادند که این وهله ها توسط دوره های دو هفته ای پاکسازی از هم جدا شدند. وهله های فعالیت مقاومتی با شدت بالا شامل شش حرکت در شش ست و چهار تکرار با شدت 90 درصد یک تکرار بیشینه، و وهله های فعالیت مقاومتی با شدت متوسط شامل شش حرکت در سه ست و ده تکرار با شدت 70 درصد یک تکرار بیشینه انجام شد. پیش و پس از وهله های فعالیت مقاومتی برای اندازه گیری شاخص های اکسایشی و ضداکسایشی خونگیری صورت می گرفت. با توجه به توزیع غیرطبیعی داده ها، برای تجزیه و تحلیل یافته ها از آزمون کروسکالوالیس استفاده و سطح معنی داری کمتر از 05/0 در نظر گرفته شد. یافته ها: هیچگونه تفاوت معنی داری بین استفاده از مکمل یا دارونما، چه در فعالیت مقاومتی با شدت بالا و چه با شدت متوسط، برای متغیرهای مالون دی آلدئید، ظرفیت تام آنتی اکسیدانی و آنزیم سوپراکساید دیسموتاز دیده نشد. نتیجه گیری: یک هفته مصرف مکمل چای سبز اثر معنیداری بر شاخص های اکسایشی و ضداکسایشی پس از فعالیت مقاومتی با شدت متوسط یا بالا در مردان کشتی گیر ندارد.
کلیدواژه‌ها
عنوان مقاله [English]
The acute effect of green tea supplementation on oxidative and antioxidant indices after resistance exercise at moderate and high intensities in trained wrestler men.
نویسندگان [English]
- soma khosravi 1
- Vahid Tadibi 2
- Dariush Sheikholeslami-Vatani 3
1 MSc Exercise Physiology, Faculty of Sports Sciences, Razi University, Kermanshah, Iran.
2 Associate Professor Exercise Physiology, Faculty of Sports Sciences, Razi University, Kermanshah, Iran.
3 Associate Professor Exercise Physiology, Faculty of Humanities and Social Sciences, University of Kurdistan, Iran.
چکیده [English]
Background and Aim: Green tea extract has been suggested as an effective antioxidant to reduce the oxidative stress following resistance exercise. The purpose of this study was to investigate theacute effect of green tea extract supplementation onthe oxidative and antioxidant indices after resistance exercise at moderate and high intensities in trained men. Materials and Methods: Eleven male resistance-trained wrestlers participated in a double-blind randomized placebo-controlled crossover design, including four 1-week treatment periods with placebo and green tea extract (900 mg daily). The participants performed two medium-intensity resistance and two high-intensity resistance, which were separated with 2-weak washout periods. The high-intensity exercise sessions included six exercises with six sets and four repetitions with ninety percent of 1RM, and the medium-intensity exercise sessions included six exercises with three sets and 10 repetitions with seventy percentof 1RM.Blood sampling conducted before and after the resistance training sessions for the measurement of oxidative and antioxidant indices. Regarding the non-normal distribution of data, the Kruskal-wallis test was used to statistical analyzes and the significance level was considered lower than 0.05%. Results: : No significant effect was observed between using green tea supplementation or placebo for the levels of Malondialdehyde, total antioxidant capacity or superoxide dismutase, neither with high nor with medium intensity exercise sessions. Conclusion: Green tea supplementation for one weak has no significant effect on oxidative and antioxidant indices after medium or high intensity resistance exercise sessions in male wrestlers.
کلیدواژه‌ها [English]
- Resistance exercise
- Oxidative stress
- Malondialdehyde
- Superoxide dismutase
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