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:: Volume 12, Issue 3 (9-2010) ::
2010, 12(3): 283-293 Back to browse issues page
Fat Oxidation and Energy Expenditure at Different Intensities of Exercise During Running and Cycling in Obese
Mehdi Zarei , Mohamadreza Hamedinia Dr, Morteza Hajinia , Mohsen Mohamad nia ahmadi , Mohamad Jaberi
, zarei.m8716@yahoo.com
Abstract:   (35830 Views)
Abstract Introduction: Running and cycling are two modalities of exercise commonly used to promote fat oxidation in weight loss programs for obese people. In order to design appropriate training programs, the objective of the present study was to compare fat oxidation and energy expenditure at different intensities of exercise during running and cycling in obese adolescent boys. Materials and Methods: Eleven healthy obese adolescent boys (mean age 13±1.2 years, mean weight 73.1±7.6 kg, and body mass index 27.5±2.5 kg/m2) voluntarily participated in this study. Subjects performed 2 incremental graded exercise tests on a cycle ergometer and a motorized treadmill. Heart rate, mean oxygen consumption and carbon dioxide generation during the last two minutes of each level of test were measured and respiratory exchange ratio was calculated. Energy expenditure and fat and carbohydrate oxidation rates were calculated at different intensity levels. Results: At comparable and similar heart rates, the fat oxidation rate was significantly higher during running, compared to cycling over a wide range of intensities (p<0.05), except at intensities of 20w and 170w, as was the total energy expenditure, compared to cycling (266±43 vs237±39 kJ/min) (p<0.05). Carbohydrate oxidation was, however, significantly higher during cycling compared to running, at intensities of 45w, 70w and 95w. Conclusion: It is concluded that for obese adolescents, in order to lose weight and reduce body fat mass (increased energy expenditure and promoted fat oxidation in a certain level of cardio-vascular responses), moderate intensity of running would be more effective than cycling.
Keywords: Fat oxidation, Energy expenditure, Running, Cycling, Adolescents, Obese
Full-Text [PDF 328 kb]   (2619 Downloads)    
Type of Study: Original | Subject: Exercise
Received: 2010/02/16 | Accepted: 2014/05/24 | Published: 2014/05/24
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zarei M, hamedinia M, hajinia M, mohamad nia ahmadi M, jaberi M. Fat Oxidation and Energy Expenditure at Different Intensities of Exercise During Running and Cycling in Obese . Iranian Journal of Endocrinology and Metabolism. 2010; 12 (3) :283-293
URL: http://ijem.sbmu.ac.ir/article-1-888-en.html


Volume 12, Issue 3 (9-2010) Back to browse issues page
مجله ی غدد درون‌ریز و متابولیسم ایران، دو ماهنامه  پژوهشی مرکز تحقیقات غدد درون‌ریز و متابولیسم، Iranian Journal of Endocrinology and Metabolism
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