Identify the reasons for the success or failure of countries in the Olympics

Based upon conflicting of economic, social, cultural, and ecological indices role on sports medals, this study was conducted to identify influential factors of countries performance in Olympics games. The present study was performed as a descriptive-analytical field design during 2000, 2004, 2008 to 2012. The statistical sample was equal to population and consisted of 297 the countries. The number of medals was determined as the sport performance of each Country. The Data of Gross Domestic production (GDP), population, life expectancy (LE), Convoy size and Hosting were determined by a questionnaire. The normal data was analyzed by the multiple regression method at α≤ 0.05. Convoy size (t=-1.764, p=0.049), life expectancy (t=2.277, p=0.010) and population () in interaction together have effect on the championship sport performance. According to the results, it can conclude that the increase of Convoy size, Obtaining hosting and improve health indicators (life expectancy) have effect on improvement the Sport performance of countries. Therefore, the essential planning is recommended to improve the influential factors and eliminate impediments of sports performance in international fields.