the main of this research was to investigate the effect of a psychological training program on mental health of elite basketball players. this research was semi–experimental with pretest posttest and a control group. the population consisted of all basketball players from iran basketball super league (n=150). they were divided into two teams: experimental and control group. minnesota multiphasi...

Does turnover improve performance by allowing firms and employees to optimally match, as outlined by job matching theory? On the other hand, could turnover harm productivity by disrupting team dynamics, as outlined by the Firm Specific Human Capital Model (FSHCM)? I attempt to answer these questions through an analysis of Major League Baseball. For exploring the general relationship between tur...

This paper focuses on the contribution of Australian Football League (AFL) players to their team's on-field network by simulating player interactions within a chosen team list and estimating the net effect on final score margin. A Visual Basic computer program was written, firstly, to isolate the effective interactions between players from a particular team in all 2011 season matches and, secon...

the aim of this study was to investigate anthropometric and physiological characteristics in junior volleyball players for talent identification according to their volleyball playing positions. 15 junior national volleyball players (mean age 17.7±0.3 years) participated in this study. players were classified to five groups according to their playing positions: setters, liberoes, middle blockers...

PURPOSE To investigate the relationship between physical fitness and team success in soccer, and to test for differences in physical fitness between different player positions. METHODS Participants were 306 male soccer players from 17 teams in the two highest divisions in Iceland. Just before the start of the 1999 soccer season, the following variables were tested: height and weight, body com...

PURPOSE This case study evaluated the effect of repeated lateral movement and jumping training on repeated effort ability in a group of national team male volleyball players. METHODS Twelve volleyball players were assessed on their volleyball-specific repeated movement and jumping abilities using a volleyball-specific repeated effort test (RET) before and after 12 weeks of training. The athle...

Newton, R.U., R.A. Rogers, J.S. Volek, K. Häkkinen, and W.J. Kraemer. Four weeks of optimal load ballistic resistance training at the end of season attenuates declining jump performance of women volleyball players. J. Strength Cond. Res. 20(4):955–961. 2006.—Anecdotal and research evidence is that vertical jump performance declines over the competitive volleyball season. The purpose of this stu...

football is the most popular sport in developed countries which has a major share of the total sports industry market. in this study we used to determining the pricing equation premier of league football players of iran based on ordinary least squares. research tools were include of three achieved questionnaires that content validity was confirmed during the several meeting and discussed and re...