Background. In general the proprioception information is a prerequisite for balance, body’s navigation system, and the movement coordinator. Due to changes between the angles of ankle, knee, and hip joints the aforementioned information are important in the coordination of the limbs and postural balance. In fact human body uses the proprioception information in order to respond to the changes in body’s position. Aim. The aim of this study was to investigate the effect of vibration on leg muscles proprioception in static and dynamic postural control. Method. Twelve male students of physical education and sport sciences (age =22.78±0.79 years, height = 169.3±5.6 cm, and weight = 68.3±2.6 kg) participated in this study volunteered. Vibration (100HZ) was used to disturb of proprioception. Vibration operated on leg muscle (gasterocnemius). Single leg stance and Star Excursion Balance Test were used for evaluation of static and dynamic postural control respectively. Subjects performed pre and post (with operated vibration) leg stance time and star excursion balance test. Paired sample test used for investigation the effect of vibration on static and dynamic postural control. Results. The results of this study indicated that dynamic postural control decreased with operated vibration on leg muscles in 8 directions of star excursion balance test(P<0.05) in contrast, leg stance time no change with operated vibration(P>0.05). Conclusion. Leg muscles proprioception plays important role in postural control and this problem is more important in dynamic postural control.
