The purpose of the study was to determine the technical elements that could lead to a prediction to winning or losing a match by taking into account the differences of the technical elements recorded among the teams that participated in the Japan word volleyball championship (Pool B). The sample consisted of 6 national men’s teams who competed in the frames of world championship during the 2006 period. The recording was made by using the official statistical logistic package of the European Confederation (CEV). Additional statistical analysis of the results took place by using the SPSS 11 statistical package. Discriminant analysis was conducted to select which subset of the measured variables significantly contributed to the prediction of winning or losing a match. Results showed that “attack error”, “jump services point”, “quick ball error“, and “jump serves”, led to the prediction of the match outcome (winning or losing a match) whereas “attack after reception” and “quick ball attack” emerged as the decisive factors for team qualification.
11 December 2012 in British Journal of Sports Medicine
Objectives: To cross-culturally adapt the VISA-P questionnaire for Greek-speaking patients and evaluate its psychometric properties.Background: The VISA-P was developed in the English language to evaluate patients with patellar tendinopathy. The validity and use of self-administered questionnaires in different language and cultural populations require a specific procedure in order to maintain their content validity.Methods: The VISA-P questionnaire was translated and cross-culturally adapted according to specific guidelines. The validity and reliability were tested in 61 healthy recreational athletes, 64 athletes at risk from different sports, 32 patellar tendinopathy patients and 30 patients with other knee injuries. Participants completed the questionnaire at baseline and after 15–17 days.Results: The questionnaire's face and content validity were judged as good by the expert committee, and the participants. Concurrent validity was almost perfect (ρ=−0.839, p<0.001). Also, factorial validity testing revealed a two-factor solution, which explained 85.6% of the total variance. A one-factor solution explained 80.8% of the variance when the other knee injury group was excluded. Known group validity was demonstrated by significant differences between patients compared with the asymptomatic groups (p<0.001). The VISA-P-GR exhibited very good test–retest reliability (ICC=0.818, p<0.001; 95% CI 0.758 to 0.864) and internal consistency since Cronbach's α analysis ranged from α=0.785 to 0.784 following a 15–17 days interval.Conclusions: The translated VISA-P-GR is a valid and reliable questionnaire and its psychometric properties are comparable with the original and adapted versions.
1 January 2012 in Journal of Strength & Conditioning Research
Tsimaras, VK, Giamouridou, GA, Kokaridas, DG, Sidiropoulou, MP, and Patsiaouras, AI. The effect of a traditional dance training program on dynamic balance of individuals with mental retardation. J Strength Cond Res 26(1): 192–198, 2012—The purpose of this study was to evaluate the influence of a Greek traditional dance training program on the dynamic balance of individuals with mental retardation (MR). A total of 17 individuals participated in this study. Ten individuals with mild or moderate MR and 7 individuals with mild or moderate MR who studied in special schools were assigned to intervention (MR-I) and control (MR-C) groups, respectively. Pretraining and posttraining exercise tests were performed to determine the dynamic balance ability. Dynamic balance ability was measured by means of a balance deck (Lafayette, Lafayette, IN, USA) in 30-, 45-, and 60-second intervals. The MR-I group underwent a 16-week Greek traditional dance training program at a frequency of 3 times per week and for a duration of 45 minutes per season. Posttraining results showed that the individuals with MR in the MR-I group improved during treatment, from their baseline scores on dynamic balance measurements (30 seconds: p < 0.01, 45 seconds: p < 0.05, 60 seconds: p < 0.05). The MR-C group did not show any improvement between the 2 measurements. In conclusion, individuals with MR may be able to improve their dynamic balance when performing a systematic and well-designed Greek traditional dance training program.
1 August 2010 in International Journal of Performance Analysis in Sport
The purpose of this study was to examine the technical skills that emerged as statistically important for volleyball men teams’ progress into the qualification round, semi-final and final in the Beijing Olympic Games of 2008. Collection of data included the use of the statistical recording program Data Volley 2 Professional (2005) for games evaluated. Additional statistical analyses included the use of SPSS 15.0. Kruskal-Wallis nonparametric test use revealed statistically significant differences among the teams concerning the “attack errors following bad receptions” factor. Additional statistical analyses using Mann - Whitney U test showed statistically important differences between the teams playing in each semi-final and the final with the qualification round teams regarding the “attack errors following bad receptions” factor. Statistically important differences were also noticed in the “attack after bad reception” between qualification round teams and teams playing in the final (Brazil-USA)
5 February 2014 in International Journal of Sport and Exercise Psychology