Document Type : Research Paper
Authors
Abstract
The purpose of this study was to determine the effect of coach stability on performance of Iranian pro league football teams. related data to statistical population of study, including 18 football teams operated in 2009-2010 season of Iranian pro league, collected from valuable archival database in league organization of football federation(as source of information) and the performance differences between teams with and without coach stability analyzed by using U mann- whitney test. In this study, performance as sporting results achieved by teams in the end of season, identified in form of 8 indexes (indicators): points, rank, win, loss, draw, goal scored, goal conceded and goal difference. And coach stability, the second variable defined as no replacement of coach in given season by teams. 33/33 percent of 18 teams had coach stability and 66/67 percent of teams replaced their coaches during given season at least once. Average period of coaching in given season was 16/1 weeks. Coach stability was affected the performance of football teams in indicators: Points (z=-2/29, p=0/022), Rank (z=-2/34,p=0/019), Win(z=-2/13, p=0/033), Draw(z=-54/2,p=0/011) and Goal differences(z=-1/96, p=0/049). The results indicated that coach change in Iranian pro-league football teams is very common. However the act of coach replacement conduct because of achieving well sporting results, but the results show this act is not effectiveness.
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