fa اکسیداسیون چربی و مصرف انرژی در شدت‌های مختلف دو نوع فعالیت ورزشی دویدن و دوچرخه‌سواری در پسران نوجوان چاق ورزش Exercise پژوهشی Original <p align="justify"> </p><p class="Abstract" dir="rtl" style="MARGIN: 0cm 36pt 0pt 1cm TEXT-INDENT: 3.7pt LINE-HEIGHT: 16pt mso-line-height-rule: exactly"><strong><u><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">مقدمه</span></u><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">: دویدن و دوچرخه</span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">سواری دو نوع از رایج</span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">ترین فعالیت</span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">های بدنی هستند که بیشتر توسط افراد چاق به منظور</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">افزایش سوخت­وساز چربی در برنامه</span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">های</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">کاهش وزن</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">استفاده می</span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">شود. به منظور طراحی برنامه</span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">های تمرینی مناسب، هدف از مطالعه‌ی حاضر مقایسه‌ی اکسیداسیون چربی و هزینه‌ی انرژی هنگام دو نوع فعالیت ورزشی دویدن و دوچرخه</span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">سواری در شدت</span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">های مختلف در نوجوانان پسر چاق بود. <u>مواد و روش</u></span><u><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span></u><u><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">ها</span></u><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">: در این مطالعه، 11 نوجوان پسر چاق و سالم به صورت داوطلبانه (با میانگین سن 2/1±13سال، وزن 6/7±1/73 کیلوگرم و نمایه‌ی توده‌ی بدن 5/2±5/27 کیلوگرم بر مترمربع) شرکت کردند. آزمودنی</span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">ها آزمون</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">ورزشی</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">درجه‌بندی شده‌ی فزاینده</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">را</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">روی</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">چرخ </span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">کارسنج</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">و</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">نوارگردان اجرا کردند.</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span dir="rtl"></span><span dir="rtl"></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt"><span dir="rtl"></span><span dir="rtl"></span><font face="Lotus"><span style="mso-spacerun: yes"><font size="3"> </font></span>ضربان</font></span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">قلب، میانگین اکسیژن مصرفی و دی</span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">اکسید</span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">کربن تولیدی در طول 2 دقیقه‌ی پایانی هر مرحله از آزمون اندازه‌گیری و نسبت تبادل تنفسی محاسبه شد. مقادیر</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">اکسیداسیون</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">چربی</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">و کربوهیدرات و هم‌چنین هزینه‌ی انرژی محاسبه</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">شد. <u>یافته</u></span><u><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span></u><u><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">ها</span></u><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">: مقادیر</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">اکسیداسیون</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">چربی در ضربان قلب</span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: "Times New Roman" mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">ِ</span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt"> مشابه و قابل مقایسه در</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">دویدن</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">روی</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">نوارگردان</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">در</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">مقایسه</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">با پدال</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">زدن</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">روی</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">چرخ </span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">کارسنج در دامنه‌ی وسیعی از شدت‌ها (به جز شدت معادل 20 و 170 وات)،</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">به</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">طور</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">معنی‌داری</span><span dir="ltr"></span><span dir="ltr"></span><span lang="FA" dir="ltr" style="mso-font-kerning: 16.0pt"><span dir="ltr"></span><span dir="ltr"></span><font face="Arial">�</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">بالاتر بود (05/0</span><font face="Arial"><span dir="ltr" style="mso-font-kerning: 16.0pt">p<</span><span dir="rtl"></span><span dir="rtl"></span></font><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt"><span dir="rtl"></span><span dir="rtl"></span>). میزان کل مصرف انرژی هنگام فعالیت روی نوارگردان نسبت به فعالیت روی چرخ</span><font face="Arial"><span dir="ltr" style="mso-font-kerning: 16.0pt">­</span><span dir="rtl"></span><span dir="rtl"></span></font><span style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt"><span dir="rtl"></span><span dir="rtl"></span> <span lang="FA"><font face="Lotus" size="3">کارسنج (43±266 کیلوژول بر دقیقه در مقابل 39±237 کیلوژول بر دقیقه) به طور معنی‌داری بیشتر بود (05/0</font></span></span><font face="Arial"><span dir="ltr" style="mso-font-kerning: 16.0pt">p<</span><span dir="rtl"></span><span dir="rtl"></span></font><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt"><span dir="rtl"></span><span dir="rtl"></span>). اما میزان اکسیداسیون کربوهیدرات در شدت</span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">های معادل 45، 70 و 95 وات در پدال زدن روی چرخ </span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">کارسنج نسبت به دویدن روی نوارگردان بالاتر بود. (05/0></span><font face="Arial"><span dir="ltr" style="mso-font-kerning: 16.0pt">p</span><span dir="rtl"></span><span dir="rtl"></span></font><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt"><span dir="rtl"></span><span dir="rtl"></span>). <u>نتیجه</u></span><u><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span></u><u><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">گیری</span></u><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">: مطالعه حاضر نشان داد برای نوجوانان چاقی که هدفشان از انجام فعالیت بدنی، کاهش وزن (افزایش مصرف انرژی و ارتقای اکسیداسیون چربی در سطح معینی از پاسخ</span><span dir="ltr" style="mso-font-kerning: 16.0pt"><font face="Arial">­</font></span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Lotus mso-ansi-font-size: 9.0pt mso-font-kerning: 16.0pt">های قلبی-عروقی) است، فعالیت دویدن با شدت متوسط، فعالیت بدنی مؤثرتری نسبت به پدال زدن روی دوچرخه است.</span><span lang="FA" style="FONT-SIZE: 11pt FONT-FAMILY: Yagut mso-ansi-font-size: 9.0pt mso-ascii-font-family: Tahoma mso-hansi-font-family: Tahoma"> <p></p></span></strong></p> 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. اکسیداسیون چربی, مصرف انرژی, دویدن, دوچرخه سواری, نوجوان, چاق Fat oxidation, Energy expenditure, Running, Cycling, Adolescents, Obese 283 293 http://ijem.sbmu.ac.ir/browse.php?a_code=A-10-789-1&slc_lang=fa&sid=1 mehdi zarei مهدی زارعی zarei.m8716@yahoo.com 4000319475328460022700 4000319475328460022700 Yes mohamadreza hamedinia محمدرضا حامدی نیا 4000319475328460022701 4000319475328460022701 No morteza hajinia مرتضی حاجی نیا 4000319475328460022702 4000319475328460022702 No mohsen mohamad nia ahmadi محسن محمدنیا احمدی 4000319475328460022703 4000319475328460022703 No mohamad jaberi محمد جابری 4000319475328460022704 4000319475328460022704 No