عنوان مقاله [English]
Aim: The aim of current study was to evaluate the effect of exercise day-time on maximal fat oxidation (MFO), exercise intensity (FATmax) and time (MFOtime) that elicite MFO and their relation to body composition in normal and overweight women.
Metod: Forteen 20-30 years old students were randomly selected and participated in to two normal waight (20<BMI-2) and overweight (BMI>25 kg.m-2) group. The data were analyzed using statical teats of dependent and paire T- test to copmair changes between session results.
Resuils: Mean value of MFO at morning was significantly higher in overweight group than that in normal group (p<0.05). Also, no significant differences were observed between groups at evening. There was no significant relationship between body fat percent and MFO at morning, nor at evening; however, there was a significant negative relationship between body fat percent and MFOtime in overweight group at evening (r=-0.92, p<0.05).
Conclusion: Generally, it seems that maximal fat oxidation during exercise is higher in the people who have more body fat percentage. However, this is eveident at morning rather than evening and enhancing fat oxidation at evening may need longer time exercise with higher intensity.