The effect of a high and low intensity training session on PYY3-36 concentration in overweight and normal weight inactive women

The purpose of this study was to investigate the effect of a session of high and low intensity exercise on changes in the concentration of peptide YY3-36 (PYY3-36) in overweight and normal weight inactive women. The current study is a type of applied research that was conducted using a semiexperimental method. Normal weight (body mass index between 18 and 24.9 kg/m2) and overweight (body mass index between 25 and 29.9 kg/m2) inactive women living in Ilam city constituted the statistical population. Ten women with inactive normal weight and 12 women with inactive overweight in the age range of 17-35 years constituted the research samples. High-intensity exercise protocol in the form of 5 sets of 4 minutes of cycling on a pedometer bicycle with an intensity of 90% of the maximum heart rate and low-intensity sports activity in the form of 40 minutes of continuous pedaling on a pedometer bicycle with an intensity of 50% of the maximum heart rate. was executed Blood samples were collected before, immediately and one hour after both exercise protocols to measure the concentration of PYY3-36. The results showed that plasma PYY3-36 concentration in both overweight and normal groups increased significantly immediately after highintensity sports activity compared to before and reached the baseline level one hour after the activity (pre test) return. Whereas, plasma PYY3-36 concentration did not change significantly after lowintensity exercise in both overweight and normal weight groups. Also, there was no significant difference between the effects of high and low intensity exercise on plasma PYY3-36 concentration in both overweight and normal weight groups. The results of this study showed the effect of exercise intensity on plasma PYY3-36 concentration, but body composition had no effect on the response of plasma PYY3-36 to exercise. These findings can be suitable for overweight and obese people who reduce their energy intake and appetite by performing high-intensity sports activities in order to achieve their goal of reducing body mass.