The main purpose of the present study was to compare the effects of three types of endurance (E), resistance (R) and combined (C) exercise on the rate of growth hormone (GH) secretion in active men. Fifteen healthy, active young men (mean age ± SD of 23 ± 1.604 years, height 173 ± 3.751 m, weight 69 ± 8.742 kg) were participated in research voluntarily. The same subjects were taking part in three types of exercise in three different time with 7-day interval among them. Blood samples taken before, immediately and 20 min after the exercise. t Test and analysis of variance were used to analyse the data (p<0.01). Results show GH secretion rate increased signifi cantly immediately and 20 min after exercise (E) and immediately after exercise (C) compared to pretest. There were no signifi cantly increase in the rate of GH secretion 20 min after exercise (C), immediately and 20 min after exercise (R). There was no signifi cant differences between the rate of GH secretion (immediately and 20 min after exercise) after E and C exercise and there was no signifi cant difference between GH secretion immediately after exercise and 20 min after exercise (E, R, C). There were signifi cant differences between GH secretion immediately and 20 min after exercise (E with R) and (C with R). Exercise directly leads to GH production changing pattern, which in turn results in creation of new tissues. It is believed that GH concentrations can change with exercise. The results of this research showed that GH concentrations was increased after endurance exercise (20 min and immediately after exercise compared to pretest), and combined exercise. It is generally concluded that various types of physical activity has a different effects on the GH responses.

The aim of this present study was to compare three types of endurance (E), resistance (R) and combined (C) exercise on cardiac biomarkers (cardiac troponin T and creatine kinase isoenzymes MB) in active men. 15 healthy and active young men (mean age ± SD of 23 ± 1.604 years, height 173 ± 3.751 m, weight 69 ± 8.742 kg and VO 2 max 51.48 ± 1.847 ml/kg/ min) voluntarily participated. Each of the subjects did three types of exercise in 7 days interval. All of the subjects using the analysis of blood samples before and immediately after exercise were evaluated. Blood samples for biochemical indicators of cardiac (cTnT and CKMB) were analysed. Statistical analysis was performed using paired T independent and repeated measures analysis of variance (p≤0.05). Results indicate that CKMB increased signifi cantly after all three types of exercise than before exercise levels. cTnT was also significantly elevated immediately after endurance training than the values before exercise, while they were not signifi cantly different between the levels of cTnT after resistance and combination exercise than the values before exercise. Results show that short-term intense endurance training increased cTnT and CK MB that show the least sign of heart damage or exerciseinduced cardiac fatigue, but resistance and combination exercise with the lack of signifi cant change in cTnT levels after exercise do not induce physiologically important degenerative changes in myocardium. However, the clinical signifi cance of these results requires further research. on 30 April 2019 by guest. Protected by copyright.