Low blood glucose had been shown to cause anxiety and disturbances in movement control, reaction time, and visual perception in previous studies. The purpose of this study was to examine the effects of anxiety and blood glucose levels before the competition performance and their effects on success in volleyball. Study cohort consisted of 40 male (%48.8) and 42 female (%51.2) volleyball players from Turkish Universities 2nd league. For measurement purposes, Spielberger State Anxiety Inventory (Öner,1985;.Spielberger,1970) and Accu-Chek Go Blood Glucose Analyzer were used. Fasting (before breakfast) and pre-competition blood glucose levels were measured 15 minutes before the competition. State Anxiety Inventories were applied 15 minutes before the competition. Pearson correlation analysis revealed no correlation between fasting and pre-competitional blood glucose and anxiety levels. Additionally, anxiety scores were not differing significantly between genders [F(1,73)=1.535; p>0.05]., amongst teams [F(6,68)=1.540; p>0.05] or athletes’ playing positions [F(2,72)=0.138; p>0.05]. In conclusion, since there was no association between pre-competition anxiety scores and blood glucose levels, neither the anxiety nor blood glucose levels had effects on sub-elite athletes of volleyball on the first set.
Keywords: Voleyball, Blood Glucose, Anxiety Level, State Anxiety