The Effects of a Single Bout of Aerobic Exercise at Different Intensities on Markers of Liver Function and Blood Hemoglobin in Healthy untrained Male

The liver is one of the most important body organs. It helps metabolism in rest، exercise and recovery stages using enzymes. The purpose of this study was to survey responses of the markers of liver function (AL، AST، ALP، Tb) and Hb to a single bout of aerobic exercise at different intensities in normal untrained males. This semi-experimental and causal cross–sectional post hoc study was conducted on the population of 19- 21 year old males in Kerman University، Iran. 56 untrained adolescent males were randomly divided into one control group and three experimental ones، the experimental groups exercised for 30min. on a cycle ergometer with corresponding rage of 60، 70 and 85 percent of maximal heart rate. Fasting blood samples were collected at pre and post exercise stages، and the data were analyzed with one way ANOVA and Tukey test (HSD). The results showed that there was a significant difference in ALP between the moderate and high intensity groups with control group (p<0. 05). Yet، the differences among the experimental groups were not significant. Also، there were significant differences (P<0. 05) in Hb، between the control group and all three experimental groups. In addition، there were significant differences between low and moderate experimental groups with high experimental group. However، the differences between low and moderate experimental groups were not significant. The results also showed that there were not significant differences among four groups in AST، ALT، and Tb. The duration of a single bout of cycling aerobic exercise with high، moderate and low intensities in none of the exercise groups damaged the liver cells.