Evolution of Physical Demands of Australian Football League Matches from 2005 to 2017: a Systematic Review and Meta-Regression Samuel J
Janetzki et al. Sports Medicine - Open (2021) 7:28 https://doi.org/10.1186/s40798-021-00301-1 SYSTEMATIC REVIEW Open Access Evolution of Physical Demands of Australian Football League Matches from 2005 to 2017: A Systematic Review and Meta-Regression Samuel J. Janetzki1* , Pitre C. Bourdon1, Kevin I. Norton1, Jackson C. Lane1 and Clint R. Bellenger1,2 Abstract Background: There is extensive research investigating the match demands of players in the Australian Football League (AFL). Objective: This systematic literature review and meta-regression sought to analyse the evolution of in-game demands in AFL matches from 2005 to 2017, focusing on the relationship between volume and intensity. Methods: A systematic search of Ovid MEDLINE, Embase, Emcare, Scopus, SPORTDiscus, and Cochrane Library databases was conducted. Included studies examined the physical demands of AFL matches utilising global positioning system (GPS) technology. Meta-regression analysed the shift in reported volume (total distance and total match time) and intensity (metres per minute [m.min−1], sprint duration and acceleration) metrics for overall changes, across quarters and positional groups (forwards, nomadics and defenders) from 2005 to 2017 inclusive and for each year between 2005 and 2007, 2007 and 2010, 2010 and 2012, and 2012 and 2015/2017 breakpoints. Results: Distance (p = 0.094), m.min−1 (p = 0.494), match time (p = 0.591), time over 18 km·h−1 (p=0.271), and number of accelerations greater than 4 km·h−1 (p=0.498) and 10 km·h−1 (p=0.335) in 1 s did not change from 2005 to 2017.
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