Introduction:
Energy balance is maintained through a complex network that includes central and peripheral factors. The obestatin peptide is a well-known peripheral factor that appear to play an important role in food intake and body weight regulation. Obestatin is a 23-amino acid peptide which is produced by post-translational modification of a protein precursor that also produces ghrelin. The aim of this study was to determine the effect of an acute bout of resistance exercise on appetite, energy intake and obestatin concentration in overweight women.
Methods:
Eleven overweight women with 18- 35 years ages completed two trials: In the resistance trial subjects performed three sets of 8 repetitions at 80% of one repetition maximum (1RM) include 7 exercises lat pull-down, leg press, chest press, knee extension, shoulder press, leg curl and seated row. In the control trial, subjects rested for 1 hour. Blood samples were collected before, immediately and 24 h after both trails for measuerd obestatin concentration. Also, appetite and energy intake estimated before and after both trails.
Results:
The results showed that, only appetite significantly decreased immediately after resistance exercise (p<0.05). However, there was no significant difference in total energy intake and obestatin concentration between trials (p>0.05).
Conclusion:
In general, this study indicated that following resistance exercise appetite was decreased in overweight women. On the other hand, considering that the amount of energy intake does not change up to 24 hours after resistance exercise, it can be said that performing such exercise leads to negative energy balance. In addition, the lack of change in obestatin concentration immediately and 24 hours after activity indicates that this hormone has no role in reducing appetite immediately after resistance exercise. It could be concluded that, suppression