Symposium
1
Thursday 1 November Papers / Journal of Science and Medicine in Sport 15 (2013) S34–S126 S103 with high SES. However little is known about objectively mea- sured MVPA among ethnic minority groups in Denmark. Based on baseline data from the When Cities Move Children study, this study investigates the association of the built environment, socio-demographic and social support variables on children’s daily physical activity. Methods: Participants were 291 children from four schools in a diverse ethnic minority community in Copenhagen, Denmark (10–16yrs). Physical activity data were obtained using accelerome- ters (Actigraph GT3X, 30 sec epoch) and Evenson cutpoints were used to determine mean daily time in MVPA. Exposure variables were based on questionnaire data, registry data, GPS/GIS derived variables and accelerometer data. Data were analyzed in STATAmp 12 using a 3-level mixed multilevel model to examine both unad- justed and adjusted models. Results: Among the participants 45% were boys, 42.5% had at least one parent who did not work and 64.3% had at least one parent with an ethnic minority background. The adjusted analyses showed that boys engage in significantly more minutes of daily MVPA than girls (boys: 57.8, girls: 36.9, p < 0.001) and that boys from a Dan- ish ethnic family accumulated significantly less minutes of daily MVPA compared to boys from an ethnic minority family (p < 0.001). Girls in grade 7 (13–14yrs) accumulated the least minutes of MVPA (p < 0.05). Being in a class with a high average mean MVPA was significantly associated with higher individual MVPA among both boys (p < 0.001) and girls (p < 0.05). None of the included built envi- ronment variables were significantly associated with MVPA in the adjusted model. Discussion: This study contradicts the notion that ethnic minor- ity boys are less physically active than Danish boys. Anecdotal work so far confirms the hypothesis that these boys are bound to spend the majority of their leisure time outdoors in their local commu- nity due to crowding in their home while girls are confined to the home to stay out of trouble and help in the home. Further analyses based on available GPS data on these participants will provide more insight, leading to new documentation on the association on out- door time and physical activity level as well as new knowledge on which built environment variables may be relevant for this group of children. http://dx.doi.org/10.1016/j.jsams.2012.11.248 Evidence informing change in Australian Football 246 Symposium Australian Football League Australian Football is a game enjoyed by people all over the World, with average AFL attendance of 34,893, 650,373 AFL club members, 790,905 participants at community level and 2537 community clubs. Total player payments at AFL level total $159 million, and the AFL Grand Final is consistently the most watched annual sporting event in Australia, with 3.5 million viewers in 2011. Accompanying the growth of the game has been a signif- icant growth in AFL club football departments in the coaching, administration, player welfare, sport medicine and sport science disciplines. In each of these areas, there are numerous examples where evidence is used to inform decision making and change. The presentations delivered as part of this session aim to illustrate how evidence is used across different parts of the industry, including injury prevention, treatment and rehabilitation, physical prepa- ration and recovery, monitoring of game trends and law making. Perspectives covered will include those of the administrator, sports physician, physiotherapist, former player and laws of the game committee member. Paper 1: Twenty years of injury surveillance in the Australian Foot- ball League: Implications and evidence for change Paper 2: Evidence upon which injury prevention and rehabilitation strategies have been developed Paper 3: Evidence of game demands and strategies to prepare play- ers Paper 4: Changes in laws and interpretations based on game infor- mation and trends Paper 5: AFL research program strategy for 2012–16 http://dx.doi.org/10.1016/j.jsams.2012.11.249 247 Twenty years of injury surveillance in the Australian Football League: Implications and evidence for change J. Orchard 1,∗ , H. Seward 2 , J. Orchard 1 1 University of Sydney 2 AFLMOA, Melbourne Introduction: AFL injury surveillance has been ongoing for 20 seasons, with all causes of missed games through injury in play- ers/teams accounted for over the past 15 seasons. There has been a gradual move from descriptive surveillance to more analytical research. Methods: The definition of an injury is one which resulted in a match being missed. The major units presented each season, in a public release, are injury incidence (new and recurrent injuries per club per season) and injury prevalence (matches missed per club per season). The twenty years of injury reports, encompassing 308843 player weeks, were reviewed to summarise major trends in the injury profile. Results: The most prevalent and common (of the 12767 new and 1900 recurrent injuries) injury in the AFL has consistently been the hamstring strain in every season of the survey. On average there are 6 hamstring injuries per club per season causing 20 weeks to be missed. The other two injury categories most consistently in the top three for injury prevalence are groin injuries and knee ACL injuries. The major trends and achievements of the 20-year-survey period were: 1) ongoing compliance of all teams and annual public release 2) the centre circle rule change to reduce risk of ruck PCL injuries 3) appreciation that grass/ground condition are a risk factor for ACL injuries 4) long-term reduction of recurrence rates for muscle strains in particular 5) low rates of head and neck injuries in second decade compared to first 6) reduction of hamstring injuries in 2011 after introduction of the substitute rule. Discussion and Conclusion: The AFL injury surveillance sys- tem is one of the world’s leading systems in professional sport. Real change has been effected as a result of the survey. The injury survey definition is useful at monitoring trends in injuries and recording the incidence of important musculoskeletal injuries. The major strength of the injury definition is excellent reliability. http://dx.doi.org/10.1016/j.jsams.2012.11.250
Transcript of Symposium
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recording the incidence of important musculoskeletal injuries. Themajor strength of the injury definition is excellent reliability.
http://dx.doi.org/10.1016/j.jsams.2012.11.250
Thursday 1 November Papers / Journal of Sc
ith high SES. However little is known about objectively mea-ured MVPA among ethnic minority groups in Denmark. Basedn baseline data from the When Cities Move Children study,his study investigates the association of the built environment,ocio-demographic and social support variables on children’s dailyhysical activity.
Methods: Participants were 291 children from four schools indiverse ethnic minority community in Copenhagen, Denmark
10–16yrs). Physical activity data were obtained using accelerome-ers (Actigraph GT3X, 30 sec epoch) and Evenson cutpoints weresed to determine mean daily time in MVPA. Exposure variablesere based on questionnaire data, registry data, GPS/GIS derived
ariables and accelerometer data. Data were analyzed in STATAmp2 using a 3-level mixed multilevel model to examine both unad-
usted and adjusted models.Results: Among the participants 45% were boys, 42.5% had at
east one parent who did not work and 64.3% had at least one parentith an ethnic minority background. The adjusted analyses showed
hat boys engage in significantly more minutes of daily MVPA thanirls (boys: 57.8, girls: 36.9, p < 0.001) and that boys from a Dan-sh ethnic family accumulated significantly less minutes of daily
VPA compared to boys from an ethnic minority family (p < 0.001).irls in grade 7 (13–14yrs) accumulated the least minutes of MVPA
p < 0.05). Being in a class with a high average mean MVPA wasignificantly associated with higher individual MVPA among bothoys (p < 0.001) and girls (p < 0.05). None of the included built envi-onment variables were significantly associated with MVPA in thedjusted model.
Discussion: This study contradicts the notion that ethnic minor-ty boys are less physically active than Danish boys. Anecdotal worko far confirms the hypothesis that these boys are bound to spendhe majority of their leisure time outdoors in their local commu-ity due to crowding in their home while girls are confined to theome to stay out of trouble and help in the home. Further analysesased on available GPS data on these participants will provide more
nsight, leading to new documentation on the association on out-oor time and physical activity level as well as new knowledge onhich built environment variables may be relevant for this group
f children.
ttp://dx.doi.org/10.1016/j.jsams.2012.11.248
vidence informing change in Australian Football
46
ymposium
Australian Football LeagueAustralian Football is a game enjoyed by people all over the
orld, with average AFL attendance of 34,893, 650,373 AFL clubembers, 790,905 participants at community level and 2537
ommunity clubs. Total player payments at AFL level total $159illion, and the AFL Grand Final is consistently the most watched
nnual sporting event in Australia, with 3.5 million viewers in011. Accompanying the growth of the game has been a signif-
cant growth in AFL club football departments in the coaching,dministration, player welfare, sport medicine and sport scienceisciplines. In each of these areas, there are numerous exampleshere evidence is used to inform decision making and change. Theresentations delivered as part of this session aim to illustrate how
vidence is used across different parts of the industry, includingnjury prevention, treatment and rehabilitation, physical prepa-ation and recovery, monitoring of game trends and law making.erspectives covered will include those of the administrator, sportsand Medicine in Sport 15 (2013) S34–S126 S103
physician, physiotherapist, former player and laws of the gamecommittee member.
Paper 1: Twenty years of injury surveillance in the Australian Foot-ball League: Implications and evidence for change
Paper 2: Evidence upon which injury prevention and rehabilitationstrategies have been developed
Paper 3: Evidence of game demands and strategies to prepare play-ers
Paper 4: Changes in laws and interpretations based on game infor-mation and trends
Paper 5: AFL research program strategy for 2012–16
http://dx.doi.org/10.1016/j.jsams.2012.11.249
247
Twenty years of injury surveillance in the Australian FootballLeague: Implications and evidence for change
J. Orchard 1,∗, H. Seward 2, J. Orchard 1
1 University of Sydney2 AFLMOA, Melbourne
Introduction: AFL injury surveillance has been ongoing for 20seasons, with all causes of missed games through injury in play-ers/teams accounted for over the past 15 seasons. There has beena gradual move from descriptive surveillance to more analyticalresearch.
Methods: The definition of an injury is one which resulted ina match being missed. The major units presented each season, ina public release, are injury incidence (new and recurrent injuriesper club per season) and injury prevalence (matches missed perclub per season). The twenty years of injury reports, encompassing308843 player weeks, were reviewed to summarise major trendsin the injury profile.
Results: The most prevalent and common (of the 12767 newand 1900 recurrent injuries) injury in the AFL has consistently beenthe hamstring strain in every season of the survey. On average thereare 6 hamstring injuries per club per season causing 20 weeks to bemissed. The other two injury categories most consistently in the topthree for injury prevalence are groin injuries and knee ACL injuries.The major trends and achievements of the 20-year-survey periodwere: 1) ongoing compliance of all teams and annual public release2) the centre circle rule change to reduce risk of ruck PCL injuries3) appreciation that grass/ground condition are a risk factor forACL injuries 4) long-term reduction of recurrence rates for musclestrains in particular 5) low rates of head and neck injuries in seconddecade compared to first 6) reduction of hamstring injuries in 2011after introduction of the substitute rule.
Discussion and Conclusion: The AFL injury surveillance sys-tem is one of the world’s leading systems in professional sport.Real change has been effected as a result of the survey. The injurysurvey definition is useful at monitoring trends in injuries and
