title: Detecting deficits in change of direction performance using the preplanned multidirectional Australian football league agility test.
abstract: The Australian Football League (AFL) agility test is a preplanned multidirectional circuit involving 5 directional changes of various magnitudes that might differently assess athletes of particular leg dominance. This study served to establish whether the AFL agility test appropriately examines athletes of differing limb dominance, while also quantifying performance deficits prevalent between limbs of Australian Footballers. Fifty-eight Australian Footballers were recruited from the Western Australian Football League (age = 21.9 ± 2.8 years; height = 183.7 ± 5.9 cm; weight = 86.4 ± 4.7 kg). Two circuits of the AFL agility test were set up in accordance with official specifications. The finish line of the second circuit was relocated to the opposite side to modify the starting direction. Footballers were randomized and counterbalanced between versions, performing 3 trials in each direction. Paired t-tests (p ≤ 0.05) were used to examine differences between dominant and nondominant trials. Independent t-tests (p ≤ 0.05) were used to identify differences between left and right leg dominant groups. The current version of the AFL agility test appropriately examined ∼61% of footballers in this cohort. The remaining ∼39% produced significantly faster times during the alternate version (0.63-0.82 seconds; p ≤ 0.001). All footballers demonstrated a performance deficit of 5-10% between limbs (∼0.72 seconds; p ≤ 0.001). Limb dominance (directional preference) was evident for all footballers. Change of direction capabilities should therefore be examined bilaterally to eliminate bias toward athletes with particular leg dominance profiles and to provide a limb deficit measure for enhanced athletic profiling outcomes.
authors.affiliation: 1Centre for Exercise and Sport Science Research, Edith Cowan University, Perth, Australia; 2Fremantle Dockers Football Club, Fremantle, Australia; and 3School of Environmental and Life Sciences, University of Newcastle, New South Wales, Australia.
authors.forename: Nicolas H
authors.initials: NH
authors.lastname: Hart
authors.forename: Tania
authors.initials: T
authors.lastname: Spiteri
authors.forename: Robert G
authors.initials: RG
authors.lastname: Lockie
authors.forename: Sophia
authors.initials: S
authors.lastname: Nimphius
authors.forename: Robert U
authors.initials: RU
authors.lastname: Newton
mesh_terms: D054874:Athletic Performance / Q000502:physiology*; D001315:Australia; D003430:Cross-Sectional Studies; D005080:Exercise Test; D005538:Football / Q000502:physiology*; D006801:Humans; D008297:Male; D011897:Random Allocation; D055815:Young Adult