تأثیر تمرینات مقاومتی با دو حجم متفاوت بر روی سطح سرمی عامل رشدی فیبروبلاست ـ 21، درصد چربی بدن و تحرک‌پذیری زنان سالمند چاق

نوع مقاله : اصیل پژوهشی

نویسندگان

1 کارشناس ارشد فیزیولوژی ورزشی، دانشکده علوم انسانی، دانشگاه بجنورد، بجنورد، ایران.

2 استادیار گروه فیزیولوژی ورزشی، دانشکده علوم انسانی، دانشگاه بجنورد، بجنورد، ایران.

3 استادیار گروه فیزیولوژی ورزشی، مرکز آموزش عالی کاشمر، کاشمر، ایران.

4 دانشیار گروه بیوشیمی بالینی، دانشکده پزشکی، دانشگاه علوم پزشکی گناباد، گناباد، ایران.

چکیده

مقدمه: عامل رشدی فیبربلاست-21 (21FGF)، لیپولیز و اکسیداسیون اسیدهای چرب را افزایش می­دهد. اثر حجم­های متفاوت تمرین مقاومتی روی 21FGF به خوبی مشخص نشده است، بنابراین مطالعه حاضر با هدف مقایسه اثرات تمرین مقاومتی با حجم پایین و بالا بر سطح سرمی 21FGF، ترکیب بدن و تحرک‌پذیری زنان سالمند چاق غیرفعال انجام شد.
روش‌کار: 30 زنان سالمند چاق غیرفعال (سن50/4±57/64 سال؛ نمایه توده بدنی 69/2±34/32 کیلوگرم بر متر مربع و درصد چربی 11/2±93/40) ساکن شهر مشهد برای شرکت در این مطالعه نیمه‌تجربی فراخوانی شدند. آزمودنی­ها به‌طور تصادفی به سه گروه برابر تمرین مقاومتی حجم پایین (LVRT) و تمرین مقاومتی حجم بالا (HVRT) و کنترل تقسیم شدند. آزمودنی­ها پروتکل­های LVRT (یک نوبت) و HVRT (سه نوبت) برای 12 هفته و دو جلسه در هفته انجام دادند. اندازه­های تن‌سنجی و ارزیابی بیوشیمیایی یک هفته قبل از اولین و 48 ساعت بعد از آخرین جلسه تمرینی انجام شد. همچنین آزمون­های 30 ثانیه بلند شدن از صندلی، آرم کرل، دو دقیقه استپ و هشت فوت آپ – اند- گو ارزیابی شد. به‌ترتیب از آزمون تی وابسته و تحلیل کواریانس برای ارزیابی تفاوت درون و بین گروهی استفاده شد.
یافته­ها: متعاقب دوره تمرینی، درصد چربی بدن در گروه HVRT نسبت به گروه LVRT (001/0=p) به‌طور معنی­داری پایین­تر بود. برعکس، نتایج 30 ثانیه بلند شدن از صندلی (001/0=p) و آرم کرل (001/0=p) در گروه HVRT نسبت به گروه LVRT به‌طور معنی­داری بالاتر بود. بر اساس نتایج، تفاوت معنی­داری بین وزن (997/0=p)، شاخص توده بدنی (999/0=p)، 21FGF (999/0=p)، دو دقیقه استپ (072/0=p) و 8 فوت آپ ـ اند ـ گو (231/0=p) بین دو گروه LVRT و HVRT در انتهای دوره تمرینی وجود نداشت.
نتیجه‌گیری: تمرین مقاومتی با سه نوبت نسبت به تمرین مقاومتی با یک نوبت موجب دستاوردهای بیشتری در بهبود ترکیب بدن و تحرک پذیری در زنان سالمند چاق می­شود.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of two different volumes of resistance training on serum level of fibroblast growth factor-21, body fat percentage and mobility in obese elderly women

نویسندگان [English]

  • Zeinab Fattahi 1
  • Hossein TaheriChadorneshin 2
  • Esmat Rashidi 3
  • Seyed-Hosein Abtahi-Eivary 4
1 M.Sc. in Exercise Physiology, School of Human Sciences, University of Bojnord, Bojnord, Iran.
2 Assistant Professor, Department of Exercise Physiology, School of Human Sciences, University of Bojnord, Bojnord, Iran.
3 Assistant Professor Department of Exercise Physiology, Kashmar Higher Education Institute, Kashmar, Iran.
4 Associate Professor, Department of Clinical Biochemistry, Faculty of Medicine, Gonabad University of Medical Sciences, Gonabad, Iran.
چکیده [English]

Introduction: Fibroblast growth factor 21 (FGF21) increases lipolysis and fatty acid oxidation. The effect of different volumes of resistance training on FGF21 is not well defined. Therefore, the aim of this study was to compare the effects of high and low volume of resistance trainings on serum level of FGF-21, body composition and mobility in sedentary obese older women.
Methods: Thirty sedentary obese elderly women (age 64.57±4.50 years, body mass index 32.34±2.69 kg/m2, and body fat percent 40.93±2.11) who were resident in Mashhad participated in this quasi-experimental study. The subjects were randomly assigned into three equal groups of control, low volume resistance training (LVRT), and high volume resistance training (HVRT). The subjects performed LVRT (one-set) and HVRT (three-set) protocols twice weekly for 12 weeks. Anthropometric and biochemical evaluations were carried out one week before the first session and 48 hours after the last session. In addition, 30-second chair stand, arm curl, two minutes step and eight foot up-and-go tests were evaluated. Dependent t-test and analysis of covariance were used to examine the intra- and inter-group differences, respectively.
Results: Following training, the body fat percentage was significantly lower in HVRT group than LVRT group (P=0.001). In contrast, the results in 30-second chair stand (P=0.001) and arm curl (P=0.001) were significantly higher in HVRT group than LVRT group. However, there were no significant differences between two groups of HVRT and LVRT in weight (P=0.999), body mass index (P=0.999), FGF21 (P=0.999), two minutes step (P=0.072), and eight foot up-and-go (P=0.231) at the end of the protocols.
Conclusion: These results demonstrate that three-set resistance training resulted in greater improvements in body composition and mobility than single-set resistance training in obese elderly women.

کلیدواژه‌ها [English]

  • Elderly
  • Fibroblast growth factor-21
  • Obesity
  • Resistance training

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مجله زنان، مامایی و نازایی ایران
دوره 23، شماره 10
دی 1399
صفحه 61-71

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