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Title: Optimum projection angle for attaining maximum distance in a rugby place kick
Authors: Linthorne, NP
Stokes, TG
Keywords: Biomechanics;Kinematics;Projectile
Issue Date: 2013
Publisher: Asist Group
Citation: Journal of Sports Science and Medicine, Online first, 2013
Abstract: This study investigated the effect of projection angle on the distance attained in a rugby place kick. A male rugby player performed 49 maximum-effort kicks using projection angles of between 20 and 50°. The kicks were recorded by a video camera at 50 Hz and a 2 D biomechanical analysis was conducted to obtain measures of the projection velocity and projection angle of the ball. The player's optimum projection angle was calculated by substituting a mathematical expression for the relationship between projection velocity and projection angle into the equations for the aerodynamic flight of a rugby ball. We found that the player's calculated optimum projection angle (30.6°, 95% confidence limits ± 1.9°) was in close agreement with his preferred projection angle (mean value 30.8°, 95% confidence limits ± 2.1°). The player's calculated optimum projection angle was also similar to projection angles previously reported for skilled rugby players. The optimum projection angle in a rugby place kick is considerably less than 45° because the projection velocity that a player can produce decreases substantially as projection angle is increased. Aerodynamic forces and the requirement to clear the crossbar have little effect on the optimum projection angle.
Description: This article has been made available through the Brunel Open Access Publishing Fund.
ISSN: 1303-2968
Appears in Collections:Sport
Brunel OA Publishing Fund
Dept of Life Sciences Research Papers

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