Abstract
Aims: obesity and weight gain is one of the risk factors of death in the world. One of the most important causes of obesity is inactivity and low physical activity. The purpose of this study is to investigate the effect of eight weeks of concurrent training (endurance, strength) on salivary cortisol and α amylase and body composition.
Materials and Methods: This research was conducted using a semi-experimental method in a control group (10 men) and two experimental groups (20 men) (one strength and endurance group and one strength and endurance group). The exercises included warm-up, endurance exercise including running, vo2max based on the principle of overload, and resistance exercise including leg press, chest press, knee bending, lats from the back, back of the arm, opening the knee and forearm, and lateral release. The data was analyzed in spss software version 26. In this study, one-way ANOVA analysis was used to check the hypotheses.
Findings: Regarding the cortisol level variable, the results showed that there was a significant difference between the pre-test and post-test only in the endurance and strength group ,salivary α amylase in all groupe had significant effect there was incrised ; the percentage of body fat had a significant effect in all groups, the fat-free mass decreased in the endurance and strength group and the strength and endurance group There was a significant increase. The body mass index decreased in the endurance group, but there was no change in the other groups. The ratio of waist to hip circumference decreased in two groups.
Conclusion: After eight weeks of strength training, salivary cortisol and α amylase increased and fat-free mass decreased, and salivary cortisol and fat-free mass increased during strength and endurance training. Also, the percentage of fat decreased significantly in all groups regardless of the order of training. The body mass index decreased only in the endurance and strength group, and the ratio of waist to hip circumference decreased in both the endurance, strength and strength, endurance training groups.