آسیه میرزاآقاجانی

ObjectiveThe present study was conducted with the aim of investigating the relationship between group sports and mental health and the formation of personality traits of prisoners during the period of the Covid-19 disease.Research methodThe present study was non-experimental of descriptive-applied type and the statistical population in this study included all the criminals of Lahijan city in 2022 including 298 people who were selected by available sampling and according to Morgan's table, the sample size was reported as 168 people.In this research, from Neo personality questionnaires, mental health and Ghaffari group sports questionnaires (2012) as research tools and in order to determine the variable power of group sports to predict the mental health of prisoners, using the regression method to analyze the data using SPSS software. 22 and Smart PLS version 3 were used. The significance level was considered 0.05 in all tests.The findingsThe findings showed that group exercise has a significant direct relationship with the mental health and personality formation of prisoners during the covid-19 disease and has improved the mental health and personality formation of prisoners.KeywordsGroup sports, mental health, personality formation, prisoners, covid-19

Since the use of interval training could be affected on aerobic performance, the effects of two types of continuous and high intensity interval training on aerobic performance in elite rowers were discussed in the present study.
Among sixty elite male rowers that participated in inter-country rowing championship, eighteen rowers (who selected as Iran national team members) divided randomly into two groups(continuous training and high intensity interval training). Rowing ergometer (Concept 2 model) and gas analyzer device was used, moreover simultaneously physiological factors measured (VO2max and VVo2max with gas analayzer, Tmax with chronometer). The training protocol in continuous group was consisted of 10 km rowing for three weeks (10 sessions per week) with 70-75% of maximum heart rate. High intensity interval (HIIT) group was done 8 sessions of continuous training per week plus 2 sessions of HIIT (including 6 sets X 1 minute ergo performance X 100% VVo2max). To analyze data, t-test was used to compare the differences within and between groups and the level of significance was set as p In both continuous and HIIT groups significant increase was observed in VO2max (p=0.01, p=0.001 respectively) and VVo2max (p=0.02, p=0.004 respectively) in post-test. Moreover, the Tmax was increased in the HIIT group significantly (p=0.001). The results of independent t-test in VO2max (p= 0.52), VVo2max (p=0.42) and Tmax (p=0.14) did not show any significant differences.
These findings showed although both types of training schedules improved VO2max and VVo2max; however improvement rate after HIIT training was no significantly higher. With accounting of only 20 percent of high intensity interval training sessions, a definitive statement about comparing the two types of exercises, further study needs.

The purpose of this study was to evaluate the effect of 8 weeks of core stability training with Swiss ball on the balance of teenager soccer players. 30 teenager soccer players were selected and divided randomly into two control and experimental groups. The training program of experimental group was included core stability exercises for 8 weeks، 3 times per week. In first four weeks experimental group performed exercises in two sets with 5 repeats and second four weeks of 2 sets with 10 repeats. In this period، the control group only participated in the practice of soccer. The evaluation of the static balance was done by Stork test and the dynamic balance was done by Y test. After normality test of data mean distribution by Kolmogorov-Smirnov test، paired- samples t-test was used for extraction of results and significance level considered if p≤0. 05. Results showed significant differences in poster medial (p=0. 002) and poster lateral (p=0. 04) direction in the experimental group in post-test. There were no significant differences in static balance (p=0. 91) and anterior direction between pre-test and post-test (p=0. 33). According to the results of this research، the core stability exercises can be performed on teenager soccer players and children by coaches and teachers to improve balance and prevent sport injuries.