The Determination of Relationship between Biorhythm (Physical Cycle) and Sport Performance in Athletes of Individual Sports in Hamadan Province

The aim of this study was to determine the relationship between biorhythm and sport performance in Hamadan athletes participating in individual sport fields. The research method employed was descriptive-correlated. The statistical population included all athletes of individual sport fields who participated in provincial competitions of Hamadan province in 1390-1391 (N=680). Based on Krejcie and Morgan table, 216 subjects were selected as the statistical sample. Biorhythm software and athlete's performance questionnaire (Charbonneau, 2001) (r=0.91) were used to collect data. In addition to descriptive statistics, inferential statistical tests such as Pearson correlation coefficient, Chi-Square test, t test and one-way analysis of variance (ANOVA) were used to analyze the data. The findings of this study showed a significant relationship between physical energy and athlete's performance (p<0.05). The result of one-way ANOVA revealed a significant relationship among different modes of physical cycle and athlete's performance (p<0.01). The results of Tukey post hoc test showed that the highest athlete's performance level was assigned to the time physical cycle was above the zero line (17.67) and the lowest athlete's performance level was at the critical point (12) or below the zero line (15.36). So, it can be concluded that the location of physical cycle under different conditions can affect athlete's performance.