Effect of predictable and unpredictable anxiety on balance control in athletes and non-athletes

The aim of this study was to determine effect of anxiety in predictable and unpredictable situation on balance control of athletes and non-athletes. 48 subjects (24 athletes، 24 non-athlete، age average= 22. 27 year) were standing upright on a force plate. Predictable and unpredictable sounds (80 dB SPL1) were delivered in order to induce predictable and unpredictable anxiety. The level of anxiety was measured with skin conductance level. Balance، area sway and Standard deviation of Mean COP (StdMcop) were calculated in the medio-lateral and anterio-posterior axes and were analyzed using two-way repeated ANOVAs. The results show increasing significance level in area sway in effect every two predictable and unpredictable anxiety in non athletes group. According to results anxiety affect on body sways and this effect is the more on non-athletes group.