Document Type : Original Article
Authors
1
Bojnourd Education Department, Bojnourd, Iran
2
Department of Physical Education, University of Tehran, Tehran, Iran
Abstract
Background and Objective: The structural and functional changes of white adipose tissue in the direction of browning can help obese and overweight people to lose weight and the resulting metabolic disorders by increasing energy expenditure.Therefore, in the present study, the effect of 12 weeks of low intensity, medium intensity and high intensity intermittent exercise on serum levels of irisin in healthy, obese and overweight men was investigated.
Materials and Methods: In this study 47 obese and overweight young men(20.50 ± 0.73 years old) participated. The participants were randomly assigned to four groups of light intensity (n=12), moderate(n=12), high(n=12) and control group (n=11). 12 week interval training were run with light (58-63%), moderate (73-78%) and high intensity (88-93%) for 25 to 63 minutes and three sessions per week.To measure the serum indices of irisin, fasting blood samples were taken 48 hours before and after the training program. Statistical data were analyzed using univariate analysis of covariance test and at the significant level (p <0.05).
Results: In this study, 12 weeks of intermittent exercise on different intensites could not cause a significant change in the irisin serum level, Also no significant difference was observed between the training groups(P> 0.05).However, intermittent exercise with both moderate and high intensity led to a significant decrease and increase in body fat percentage and VO2max in overweight and obese men (P<0.05).
Conclusion: 12 weeks of intermittent exercise with different intensities, despite no change in serum irisin level, improved body composition and increased VO2max in obese and overweight young men in two moderate and high intensity groups.
Background and Objective: The structural and functional changes of white adipose tissue in the direction of browning can help obese and overweight people to lose weight and the resulting metabolic disorders by increasing energy expenditure.Therefore, in the present study, the effect of 12 weeks of low intensity, medium intensity and high intensity intermittent exercise on serum levels of irisin in healthy, obese and overweight men was investigated.
Materials and Methods: In this study 47 obese and overweight young men(20.50 ± 0.73 years old) participated. The participants were randomly assigned to four groups of light intensity (n=12), moderate(n=12), high(n=12) and control group (n=11). 12 week interval training were run with light (58-63%), moderate (73-78%) and high intensity (88-93%) for 25 to 63 minutes and three sessions per week.To measure the serum indices of irisin, fasting blood samples were taken 48 hours before and after the training program. Statistical data were analyzed using univariate analysis of covariance test and at the significant level (p <0.05).
Results: In this study, 12 weeks of intermittent exercise on different intensites could not cause a significant change in the irisin serum level, Also no significant difference was observed between the training groups(P> 0.05).However, intermittent exercise with both moderate and high intensity led to a significant decrease and increase in body fat percentage and VO2max in overweight and obese men (P<0.05).
Conclusion: 12 weeks of intermittent exercise with different intensities, despite no change in serum irisin level, improved body composition and increased VO2max in obese and overweight young men in two moderate and high intensity groups.
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