Maximal Fat Oxidation during exercise in trained Male students

The purpose of this study was to determine appropriate intensity of activity with Fat max during incremental exercise in trained male subjects. To do so,11 trained male students (VO2max: 42.87±1.75ml.kg.min and BMI 21.40±1.01) took an incremental running test with 3 minute intervals on the treadmill.During the test, fat oxidation rate was measured using indirect stoichiometry method. Maximal fat oxidation and total fat oxidation rate variables were determined during this test.The mean value of fat oxidation rates were compared in 7 levels of exercise intensity with repeated measurement and LSD test. The results showed that maximal fat oxidation rate was0.29±0.03g.min in untrained subjects. The total fat oxidation rate in trained subjects was 1.47 ± 0.11g/min.There was a significant different between thefat oxidation rateduring 7 levels of exercise (p=0.001). Based on VO2max and HRmax percentage, the maximal fat oxidation was occurring in40.09±2.58percent of VO2max and 56.45±4.33percent of HRmax in trained subjects. Based on the results, with increase the exercise intensity until Fatmax point the fat oxidation rates were increase and afterward that decrease in higher exercise intensity.