تأثیر عصاره چای سبز بر شاخصهای آسیب کبدی ) ALT و AST ( ناشی از تمرینات تناوبی شدید فوتبالیستهای حرفهای

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشگاه شیراز

2 سازمان آموزش وپرورش

3 دانشیار دانشگاه شیراز

چکیده

 مقدمه: یکی از تمرینات ورزشی که امروز برای افزایش آمادگی ورزشکاران بسیار مورد استفاده قرار میگیرد، تمرینات تناوبی شدید (HIIT) میباشد اما شدت بالای این تمرینات میتواند به بافتهای دیگر مانند کبد آسیب برساند. در مقابل به نظر میرسد عصاره چای سبز بتواند کبد را در برابر انواع آسیبهای محیطی حفظ نماید. هدف از پژوهش حاضر، بررسی اثر مکمل چای سبز بر دو آنزیم ALT وAST  به عنوان شاخصهای آسیب کبد بعد از تمرینات تناوبی شدید بر روی فوتبالیستهای حرفهای بود.مواد و روشها: شرکت کنندگان این مطالعه نیمه تجربی، مردان بازیکن فوتبال از تیم گل گهر سیرجان بودند. بدین منظور 16 نفر (سن31/2 ± 25/23 سال، وزن 42/5 ± 50/68 کیلوگرم، قد 24/12 ± 175 سانتی متر) در دوگروه انتخاب شدند. آزمون در دو نوبت، انجام و در هر نوبت 5 دقیقه قبل و بعد و24 ساعت بعد از آزمون از بازیکنان خون گرفته شد. پروتکل تمرینی شامل 4 ست یک دقیقهای بود که در فاصله 50 متر رفت و برگشت با شدت بالاتر از 90 درصد  VO2maxبا 2 دقیقه استراحت بین هر فعالیت با شدت کم(50 تا 60 درصد VO2max) صورت گرفت که در کل شامل 4 دقیقه فعالیت و 8 دقیقه استراحت فعال بود. بعد از 14روز، شرایط تکرار شد با این تفاوت که گروهی که دارونما گرفته بودند این مرتبه مکمل چای سبز مصرف میکردند. تجزیه و تحلیل داده های آماری با استفاده  از آزمون t همبسته برای تعیین تفاوت بین گروهی انجام شد.یافته ها: نتایج آماری، نشان دهنده تفاوت معنادار بین گروه مکمل و دارو نما بود. بر همین اساس آنزیم AST  در گروه مکمل بلافاصله و 24 ساعت پس از فعالیت به صورت معناداری از گروه دارونما پایین‌تر بود (به ترتیب (001/0=p) و (02/0=p)). آنزیم ALT نیز در گروه مکمل بلافاصله پس از فعالیت از مقادیر کمتری در مقایسه با گروه دارونما برخوردار بود (012/0=p) و در مقادیر 24 ساعت پس از فعالیت هیچگونه تفاوت معناداری مشاهده نشد.نتیجه گیری: با توجه به معنادار بودن نتایج پژوهش به نظر میرسد عصاره چای سبز موجب کاهش شاخصهای آسیب کبدی بعد از تمرینات تناوبی شدید میشود.

عنوان مقاله [English]

The effect of green tea extract on indices of liver damage (ALT and AST) caused by high intensity interval training of professional soccer players

چکیده [English]

Abstract
Introduction: One of the exercises which is used today to increase athlete's fitness is high intensity interval training (HIIT), but the high intensity of these practices can damage other tissues such as the liver. In contrast, it seems that green tea extract can protect the liver against a variety of environmental damages. The aim of this study was to investigate the effects of green tea supplementation on two enzymes ALT and AST as indices of liver damage after high-intensity interval training on professional soccer players.
Methods: The subjects of this semi experimental study were male soccer players of Gol-e-Gohar Sirjan’s team. For this purpose, sixteen players (age 23.25±2.31 year, weight 68.50 ±5.42 kg, height 175.00±12.24 cm) in two groups were selected. Test on two occasions, and in each Blood samples were collected 5 minutes before and 24 hours after performing the test. The training program included running in 50m distance as go and come with intensity higher than 90% VO2max with 2 min rest between each activity with intensity between 50 to 60% VO2max, totally included 4 min activity and 8 min active rest. After 14 days, Conditions was repeated with the exception that a placebo group consumed green tea supplement in this stage. The data were analyzed using paired t-test to determine differences between groups.
Results: The statistical results showed a significant difference between the supplement group and the placebo. Accordingly, AST enzyme in supplement group immediately and 24 hours after exercise was significantly lower than the placebo group (respectively (p=0.001) and (p=0.02)). ALT enzyme also in supplement group immediately after exercise had a much lower dose compared with the placebo group (p=0.012) and no significant difference was observed 24 hours after the activity.
Conclusion: based on the significance of the results it seems that green tea extract would reduce the indices of liver damage after high intensity interval training.

کلیدواژه‌ها [English]

  • Key words: liver enzymes
  • high intensity interval training- green tea extract-soccer
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