اثر نوع فعاليت ورزشي بر ميزان اكسيداسيون چربي، MFO و Fatmax در زنان جوان

The Effect of Exercise Mode on Fat Oxidation, MFO and Fatmax in Young Females

The aim of present study was to compare fat oxidation rates, maximal fat oxidation (MFO) and the intensity that elicits maximal fat oxidation (Fatmax), in two exercise modes (running and cycling). Ten untrained student girls (aged 23.1±1.90 yr; height 163.3±10 cm; weight 57.3±4.4 kg; body fat percent 28.2±3.1) participated in this study as subjects. Subjects completed maximal graded exercise tests on the cycle ergometer and the treadmill. Gas exchange and heart rate were measured 10 min before and throughout the exercise test. Fat oxidation rates were calculated using stoichiometric equations. Two way analysis variance for repeated measure, bonferroni, t tests were performed to analysis data. The result of this study showed that fat oxidation rates (0.13±0.03 vs. 0.06±0.02 g/min), MFO (0.21±0.06 vs. 0.15±0.05 g/min) and V02max (28.4±4.5 vs. 23.2±4.4 ml/kg/min) was significantly higher during the treadmill test compared with the cycle ergometer (p<0.05). While, Fatmax rates was not significantly difference between exercise modes (%42.83 V02max on treadmill vs. %47.87 V02max on ergometer). From the result of this study it can be concluded that Fat oxidation rates in similar relative intensity of exercise are remarkably different in mode of exercise. Also, maximal fat oxidation is higher in activities which used higher muscle mass.