@article { author = {Bassami, Minoo and Ahmadizad, Sajad and Rahmani, Hiwa and Khodamoradi, Arash}, title = {The Effect of Resistance Exercise Intensity on Plasma Visfatin Levels and Its Relationship with Insulin Resistance and Related Hormones}, journal = {Journal of Sport Biosciences}, volume = {7}, number = {1}, pages = {31-44}, year = {2015}, publisher = {University of Tehran}, issn = {2008-9325}, eissn = {2676-4148}, doi = {10.22059/jsb.2015.54273}, abstract = {The aim of the present study was to investigate the response of plasma visfatin to resistance exercise intensity and its relationship with insulin resistance, growth hormone and IL-6. After familiarization and determining their maximum strength (1-RM), 15 healthy young subjects (age: 26.2±4.1 yr, weight: 75.1±9.1 kg) performed three resistance exercise sessions at intensities of 30%, 55% and 80% of 1-RM with equal volumes randomly with a one-week interval. Blood samples were collected before and immediately after the exercise and analyzed to measure glucose, insulin, growth hormone, interlukin-6 (IL-6) and visfatin. Results showed no significant differences among the responses of plasma visfatin, interlukin-6 and insulin resistance index to three different resistance exercise intensities (P>0.05). Irrespective of intensity, a session of resistance exercise had a significant effect (P<0.001) on all variables except for visfatin. No significant relationships were found among all measured variables (P>0.05). Based on the findings of the present study, it could be concluded that resistance exercise intensity was not an effective factor for the response of visfatin, IL-6 and insulin resistance index which might be due to small differences in energy cost of resistance exercise at different intensities but equal volumes. Since there was no significant relationship between visfatin and insulin resistance in response to resistance exercise, this adipokine cannot be involved in insulin resistance during exercise.}, keywords = {interlukin-6,maximum strength,resistance exercise intensity,visfatin}, title_fa = {تأثیر شدت فعالیت مقاومتی بر سطوح ویسفاتین پلاسمایی و ارتباط آن با مقاومت به انسولین و هورمون‌های مرتبط}, abstract_fa = {هدف از این تحقیق، بررسی پاسخ غلظت پلاسمایی ویسفاتین به شدت فعالیت مقاومتی و ارتباط آن با مقاومت به انسولین، هورمون رشد و اینترلوکین-6 بود. پانزده آزمودنی جوان و سالم با سن 1/4±2/26 سال و وزن 1/9±1/75 کیلوگرم، بعد از جلسات آشنایی و تعیین قدرت بیشینه، سه جلسه فعالیت مقاومتی با شدت‌های30درصد، 55درصد و 80درصد قدرت بیشینه و با حجم‌های یکسان را به فاصلۀ یک هفته و به‌طور تصادفی اجرا کردند. قبل و بلافاصله بعد از فعالیت مقاومتی، از آزمودنی‌ها خون‌گیری به‌عمل آمد و نمونه‌ها برای اندازه‌گیری گلوکز، انسولین، هورمون رشد، اینترلوکین-6 و ویسفاتین آنالیز شدند. نتایج نشان داد که بین پاسخ پلاسمایی ویسفاتین، اینترلوکین-6 و شاخص مقاومت به انسولین به سه شدت متفاوت فعالیت مقاومتی، تفاوت معنی‌داری وجود ندارد (05/0P). نتایج، ارتباط معنی‌داری را بین هیچ‌یک از فاکتورهای اندازه‌گیری‌شدۀ تحقیق نشان نداد (05/0