نوع مقاله : مقاله پژوهشی
نویسندگان
1 دکتری فیزیولوژی ورزشی، دانشکده علوم ورزشی، دانشگاه بیرجند، بیرجند، ایران.
2 استاد گروه علوم ورزشی، دانشکده علوم ورزشی، دانشگاه بیرجند، بیرجند، ایران
3 استادیار گروه علوم ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه سیستان و بلوچستان، زاهدان، ایران.
چکیده
زمینه و هدف: آدیپولین، یک آدیپوسایتوکاین ضدالتهابی و حساس به انسولین است که در تعدیل عدم تحمل گلوکز و مقاومت انسولینی نقش دارد. این آدیپوکاین از بافت چربی سفید ترشح می شود و سطح آن در شرایط چاقی و دیابت کاهش می یابد. هدف از این مطالعه، بررسی اثر هشت هفته تمرین تداومی با شدت 45 تا 60 درصد ضربان قلب بیشینه بر سطوح پلاسمایی آدیپولین، حساسیت به انسولین و درصد چربی بدن زنان دارای اضافه وزن و چاق بود. روش تحقیق: در این مطالعه نیمه تجربی، 30 نفر از زنان دارای اضافه وزن و چاق به طور هدفمند انتخاب و به صورت تصادفی به دو گروه تجربی (15=n) و کنترل (15=n) تقسیم شدند. برنامه ﺗﻤﺮﯾنی ﮔﺮوه تجربی شامل30 دقیقه دویدن با شدت 60-45 درﺻﺪ ﺿﺮﺑﺎن ﻗﻠﺐ بیشینه ﺑﻮد. در اوﻟﯿﻦ ﺟﻠﺴﻪ، ﺗﻤﺮﯾﻦ با شدت 45 درﺻﺪ ﺿﺮﺑﺎن ﻗﻠﺐ بیشینه آﻏﺎز شد و ﺑﻪ ﺗﺪرﯾﺞ ﺑﺎ ﭘﯿﺸﺮﻓﺖ آﻣﺎدﮔﯽ شرکت کننده ها، ﻫﺮ ﻫﻔﺘﻪ پنج درصد بر شدت ﺗﻤﺮﯾﻦ اﻓﺰوده گردید و ﭘﺲ از رﺳﯿﺪن ﺑﻪ ﺷﺪت 60 درﺻﺪ ﺿﺮﺑﺎن هدف، اﯾﻦ وﺿﻌﯿﺖ ﺗﺎ ﭘﺎﯾﺎن برنامه تمرینی ﺣﻔﻆ شد. خونگیری پس از 12 ساعت ناشتایی در دو مرحله پیش و پس آزمون انجام و متغیرهای مطالعه اندازه‌گیری گردید. از آزمون های شاپیرو-ویلک برای طبیعی بودن توزیع داده ها و به منظور بررسی تغییرات درون‌‌گروهی و بین‌‌گروهی به ترتیب از آزمون‌‌های t وابسته و t مستقل در سطح معنی داری 05/0>p استفاده شد. یافته ها: پس از هشت هفته تمرین تداومی با شدت سبک تا متوسط، سطح آدیپولین پلاسما (001/0>p) و حساسیت به انسولین (001/0>p) نسبت به قبل تمرین افزایش معنی‌داری پیدا کرد، اما درصد چربی بدن کاهش معنی داری (0001/0>p) داشت. در مقایسه بین گروهی، مقادیر آدیپولین پلاسما (001/0>p) و حساسیت به انسولین (001/0>p) در گروه تمرین نسبت به گروه کنترل، افزایش معنی داری داشت؛ اما درصد چربی بدن با کاهش معنی دار (001/0>p) همراه بود. نتیجه گیری: تمرینات تداومی با شدت سبک تا متوسط، به عنوان یکی از راهکارهای درمانی مناسب، با افزایش آدیپولین، حساسیت به انسولین و کاهش درصد چربی بدن می تواند در کاهش اختلالات مرتبط با اضافه وزن و چاقی موثر باشد.
کلیدواژه‌ها
عنوان مقاله [English]
The effect of continuous training on plasma levels of adipolin, insulin sensitivity and body fat percent in overweight and obese women
نویسندگان [English]
- Rezvane Galdavi 1
- Mehdi Mogharnasi 2
- Shila Nayebifar 3
1 PhD in Exercise Physiology, Department of Sport Sciences, University of Birjand, Birjand, Iran.
2 Full Professor of Exercise Physiology, Department of Sport Sciences, University of Birjand, Iran.
3 Assistant Professor of Exercise Physiology, Department of Sport Sciences, Faculty of Educational Sciences and Psychology, University of Sistan and Baluchestan, Zahedan, Iran
چکیده [English]
Background and Aim: Adipolin is an anti-inflammatory and insulin sensitive adipocytokine that can be considered as modulating glucose intolerance and also insulin resistance. It is secreted from white adipose tissue and its level can decrease in obese and diabetes people. The aim of this study was to evaluate the effect of eight weeks of continuous training with 45-60% maximum heart rate on plasma levels of adipolin, insulin sensitivity, and body fat percent in overweight and obese women. Materials and Methods: In this semi experimental study, 30 overweight and obese women were selected and randomly divided into experimental (n=15) and control (n=15) groups. The experimental group performed running protocol at an intensity of 45-60% maximum heart rate for 30 minutes. The exercise started with a 45% maximum heart rate in the first session, while the intensity was gradually added about 5% every week, based on the subject’s physical fitness level. Further, it was maintained up to the end of the program when the subjects reached their 60% maximum heart rate. The blood sample was measured after 12 hours of fasting in pre and post-test phases to measure the variables. The Shapiro-Wilk normality test was done while intra–inter group changes were identified by paired t and independent t-tests respectively, at the significance level of p<0.05. Results: After eight weeks of continuous training with light to moderate intensity, plasma adipolin levels (p<0.001) and insulin sensitivity (p<0.001) increased significantly as compared to pre-workout while body fat percentage was significantly decreased (p<0.0001). The comparison between the groups showed that plasma adipolin levels (p<0.001) and insulin sensitivity (p<0.001) significantly increased in the experimental group compared to the control group, that the body fat percentage also indicated a significantly (p<0.001) decrease. Conclusion: Based on the results of this study, light to moderate intensity continuous training can be considered in some disorders associated with overweight and obesity, by increasing adipolin, insulin sensitivity, and reducing body fat percentage.
کلیدواژه‌ها [English]
- Adipolin
- Exercise training
- Insulin sensitivity
- Body fat percent
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