The present study has examined the effect of psychological capital on organizational citizenship behavior. This is a case study with cross-sectional design and questionnaire as research method. Statistical population was the formal and contract staff of the Ministry of Youth and Sport (N=210 Employees). The data related to psychological capital and organizational citizenship behavior variables are gathered via Luthans et al. (2007) and Podsakoff et al. (1994) standard questionnaires. The reliability of the standard questionnaire was measured by CR and AVE tests and the validity of that was measured  by confirmatory factor analysis via Smart PLS Software. The questionnaire distributed among 160 employees that those selected randomly. Data analyzing was performed by Smart PLS and XLSTAT via structural equations method (SEM). The results show that psychological capital has a positive and meaningful impact on organizational citizenship behavior. We also showed that the most impact of dimensions of psychological capital on organizational citizenship behavior (R²:0.35) is made by altruism dimension.

The aim of this study was to Compare Effectiveness motor proficiency of the nutritional status on men in different age groups ((children, adolescents and young adults)), respectively. Statistical Society study was for children all student ages 10-7 years, for adolescents all student ages 15-12 years and for Youth of all students 20-18 of Tehran University except the student physical education. The sample was 90 people in each of the age groups, the four elementary schools and four high schools in Tehran and Tehran University male students were chosen by cluster sampling. This study was a descriptive survey and comparison measurement was test of instruments anthropometric and Brvnynks- Oseretsky. The results showed that among malnutrition, moderate nutrition and proper nutrition in adolescence and adulthood motor proficiency was not statistically different ages but among children ages motor proficiency were significantly different. In addition, no significant difference between motor proficiency age groups. It seems due to the impact of nutritional status on motor proficiency, and this issue was observed in this study at an early age; therefore, children are the most vulnerable in this context and considering the nutritional status of children is very important.