Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

Changes in knee joint biomechanics following balance and technique training and a season of Australian football

Donnelly, C.J., Elliott, B.C., Doyle, T.L.A., Finch, C.F., Dempsey, A.R.ORCID: 0000-0001-8219-6120 and Lloyd, D.G. (2012) Changes in knee joint biomechanics following balance and technique training and a season of Australian football. British Journal of Sports Medicine, 46 (13). pp. 917-922.

PDF - Published Version
Download (183kB)
Link to Published Version:
*Subscription may be required


Purpose: Determine if balance and technique training (BTT) implemented adjunct to normal Australian football (AF) training reduces external knee loading during sidestepping. Additionally, the authors determined if an athlete's knee joint kinematics and kinetics change over a season of AF. Methodology: Eight amateur-level AF clubs (n=1,001 males) volunteered to participate in either 28 weeks of BTT or a 'sham' training (ST) adjunct to their normal preseason and regular training. A subset of 34 athletes (BTT, n=20; ST, n=14) were recruited for biomechanical testing in weeks 1-7 and 18-25 of the 28-week training intervention. During biomechanical testing, participants completed a series running, preplanned (PpSS) and unplanned sidestepping (UnSS) tasks. A linear mixed model (α=0.05) was used to determine if knee kinematics and peak moments during PpSS and UnSS were influenced by BTT and/or a season of AF. Results: Both training groups significantly (p=0.025) decreased their peak internal-rotation knee moments during PpSS, and significantly (p=0.022) increased their peak valgus knee moments during UnSS following their respective training interventions. Conclusions: BTT was not effective in changing an athlete's knee joint biomechanics during sidestepping when conducted in 'real-world' training environments. Following normal AF training, the players had different changes to their knee joint biomechanics during both preplanned and unplanned sidestepping. When performing an unplanned sidestepping task in the latter half of a playing season, athletes are at an increased risk of ACL injury. The authors therefore recommend both sidestepping tasks are performed during biomechanical testing when assessing the effectiveness of prophylactic training protocols.

Item Type: Journal Article
Murdoch Affiliation(s): School of Chiropractic and Sports Science
Publisher: BMJ Publishing Group
Copyright: © Article author 2012
Item Control Page Item Control Page


Downloads per month over past year