title: Differences in dynamic balance scores in one sport versus multiple sport high school athletes.
abstract: OBJECTIVE
  Researchers have previously reported on the importance of dynamic balance in assessing an individual's risk for injury during sport. However, to date there is no research on whether multiple sport participation affects dynamic balance ability. Therefore, the purpose of this study was to determine if there was a difference in dynamic balance scores in high school athletes that competed in one sport only as compared athletes who competed in multiple sports, as tested by the Lower Quarter Y Balance Test (YBT-LQ).
  
  
  METHODS
  Ninety-two high school athletes who participated in one sport were matched, by age, gender and sport played, to athletes who participated in the same sport as well as additional sports. All individuals were assessed using the YBT-LQ to examine differences in composite reach score and reach direction asymmetry between single sport and multiple sport athletes. The greatest reach distance of three trials in each reach direction for right and left lower-extremities was normalized by limb length and used for analysis. A two-way ANOVA (gender x number of sports played) was used to statistically analyze the variables in the study.
  
  
  RESULTS
  No significant interactions or main effects related to number of sports played were observed for any YBT-LQ score (p>0.05). Male athletes exhibited significantly greater normalized reach values for the posteromedial, posterolateral, and composite reach while also exhibiting a larger anterior reach difference when compared to the females. Athletes who participated in multiple sports had similar performances on the YBT-LQ when compared to athletes who participated in a single sport.
  
  
  CONCLUSIONS
  The findings of this study suggest that the number of sports played by a high school athlete does not need to be controlled for when evaluating dynamic balance with the YBT-LQ.
authors.forename: Paul P
authors.initials: PP
authors.lastname: Gorman
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Butler
authors.forename: Mitchell J
authors.initials: MJ
authors.lastname: Rauh
authors.forename: Kyle
authors.initials: K
authors.lastname: Kiesel
authors.forename: Phillip J
authors.initials: PJ
authors.lastname: Plisky