Effects of Closed and Open Kinetic Chain Exercise Induced-Localized Fatigue on Static and Dynamic Balance in Trained Individuals

Background: As balance impairment induced by fatigue is implicated in injury occurrence, the aim of this study was to evaluate the effects of closed and open kinetic chain exercise-induced localized fatigue on static and dynamic balance in trained individuals. Methods: 30 healthy boys with mean age of 19.751.20 years, participated in this research. Static and dynamic balance were measured before and after open and closed chain fatigue protocol. Static and dynamic balance were measured respectively using the Balance Error Scoring System (BESS) and the Star Excursion Balance test (SEBT) in eight directions. The data was analyzed by two-way repeated measures ANOVA at the significance level of P0.05. Results: The results indicated that both static and dynamic balance changed significantly following the study intervention (P 0.05). In addition, a statistically significant difference was found after fatigue protocol in the static and dynamic balance between open (P = 0.003) and closed (P = 0.001) kinetic chains and respectively. Conclusions: Localized fatigue in both open and closed kinetic chain has affected the static and dynamic balance. Although, localized fatigue in the closed kinetic chain has amoredevastatingeffectonstatic balance, in theopenkinetic chain, themoredeleterious effect influenced the dynamic balance.