title: [Influence of Ankle Braces on the Prevalence of Ankle Inversion Injuries in the Swiss Volleyball National League A].
abstract: BACKGROUND
  Ankle inversion is a common injury among volleyball players. The injury rate during a game is 2.1 times higher than during training. As a result, the preventive use of ankle braces is frequently observed in Swiss volleyball leagues. Studies have shown that ankle braces have a preventive effect on the prevalence of ankle inversion. In Switzerland there has been no investigation into the preventive use of braces and their influence on prevalence. For this reason, the goals of this study are 1) to determine when, why and by whom ankle braces are worn and 2) to evaluate the injury rate of users and non-users of ankle braces.
  
  
  METHODS
  A modified questionnaire was sent to 18 men's and women's teams of the Swiss National League A. The questionnaire included questions about injury rates and the circumstances of ankle inversion injuries. The data were statistically analysed with Microsoft Excel 2012 and SPSS Version 20.
  
  
  RESULTS
  The overall response rate was 61 %, allowing data from 181 players to be analysed. 33 % (59 of 181) of the players used an ankle brace. There was a statistically significant difference in the prevalence of ankle inversion between users (12 injured) and non-users (8 injured) (p = 0.006). Wearing an ankle brace during training or during a game made no difference in the prevention of injuries (p = 0.356). More athletes were injured during training (n = 13) than during a game (n = 7).
  
  
  CONCLUSIONS
  The results of the present study indicate that volleyball players preferably wear ankle braces to prevent injury. More than one third of the players in the study wore an ankle brace, 60 % for primary prevention and 40 % for secondary prevention due to a previous injury. The study shows that significantly more users than non-users of ankle braces were injured. This is contrary to literature. Furthermore it was shown that more injuries occur during training than during a game. This finding results from the fact that ankle braces were rarely worn during training. It is concluded that ankle braces must be worn consistently, especially during training.
authors.affiliation: Berner Fachhochschule, Gesundheit, Disziplin Physiotherapie, Bern, Schweiz.
authors.forename: J
authors.initials: J
authors.lastname: Jaggi
authors.affiliation: Berner Fachhochschule, Gesundheit, Disziplin Physiotherapie, Bern, Schweiz.
authors.forename: S
authors.initials: S
authors.lastname: Kneubühler
authors.affiliation: Berner Fachhochschule, Gesundheit, Disziplin Physiotherapie, Bern, Schweiz.
authors.forename: S
authors.initials: S
authors.lastname: Rogan
mesh_terms: D000328:Adult; D016512:Ankle Injuries / Q000453:epidemiology* / Q000517:prevention & control*; D001265:Athletic Injuries / Q000453:epidemiology* / Q000517:prevention & control*; D001915:Braces / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D011482:Protective Devices / Q000706:statistics & numerical data; D012189:Retrospective Studies; D012307:Risk Factors; D019876:Sports Equipment / Q000706:statistics & numerical data*; D013557:Switzerland / Q000453:epidemiology; D054798:Volleyball / Q000293:injuries* / Q000706:statistics & numerical data; D055815:Young Adult