title: Age profiles of sport participants.
abstract: BACKGROUND
  Participation in sport has many health benefits, and is popular amongst children. However participation decreases with age. While the membership records of peak sports organisations have improved markedly in recent years, there has been little research into sport participation trends across the lifespan. This study investigates age profiles of participation in sport and compares these trends between genders and residential locations.
  
  
  METHODS
  De-identified 2011 participant registration data for seven popular Australian sports (Australian Football, Basketball, Cricket, Hockey, Lawn Bowls, Netball and Tennis) were obtained and analysed according to age, gender and geographical location (metropolitan v non-metropolitan) within the state of Victoria, Australia. All data were integrated and sports were analysed collectively to produce broadly based participation profiles while maintaining confidentiality of membership data for individual sports.
  
  
  RESULTS
  The total number of registered participants included in the data set for 2011 was 520,102. Most participants (64.1 %) were aged less than 20 years. Nearly one third (27.6 %) of all participants were aged 10-14 years, followed by the 5-9 year age group (19.9 %). Participation declined rapidly during adolescence. A higher proportion of males than female participants were young children (4-7 years) or young adults 18-29 years; this pattern was reversed among 8-17 year-olds. A higher proportion of metropolitan participants were engaged between the ages of 4-13 and 19-29, whereas a higher proportion of non-metropolitan participants played during adolescence (14-18 years) and throughout mature adulthood (30+ years).
  
  
  CONCLUSIONS
  Increasing participation in sport is an objective for both government and sporting organisations. In order to have both mass population-based participation, from a health policy and elite performance perspective, we need to further explore the findings arising from the analysis of this extensive data set. Such an examination will lead to better understand of the reasons for attrition during adolescence to inform program and policy developments to retain people participating in sport, for a healthy and sport performing nation.
authors.affiliation: Institute of Sport, Exercise and Active Living, Victoria University, PO Box 14428, Melbourne, Victoria 8001 Australia ; School of Health Sciences and Psychology, Federation University, Ballarat, Australia.
authors.forename: Rochelle M
authors.initials: RM
authors.lastname: Eime
authors.affiliation: Institute of Sport, Exercise and Active Living, Victoria University, PO Box 14428, Melbourne, Victoria 8001 Australia ; School of Health Sciences and Psychology, Federation University, Ballarat, Australia.
authors.forename: Jack T
authors.initials: JT
authors.lastname: Harvey
authors.affiliation: Institute of Sport, Exercise and Active Living, Victoria University, PO Box 14428, Melbourne, Victoria 8001 Australia ; School of Health Sciences and Psychology, Federation University, Ballarat, Australia.
authors.forename: Melanie J
authors.initials: MJ
authors.lastname: Charity
authors.affiliation: School of Health Sciences and Psychology, Federation University, Ballarat, Australia.
authors.forename: Meghan M
authors.initials: MM
authors.lastname: Casey
authors.affiliation: Institute of Sport, Exercise and Active Living, Victoria University, PO Box 14428, Melbourne, Victoria 8001 Australia.
authors.forename: Hans
authors.initials: H
authors.lastname: Westerbeek
authors.affiliation: Institute of Sport, Exercise and Active Living, Victoria University, PO Box 14428, Melbourne, Victoria 8001 Australia.
authors.forename: Warren R
authors.initials: WR
authors.lastname: Payne
keywords: Age patterns; Participation; Sport