A PROCEDLIRE FOR DETERMINING TWO 'POSTURAL INSTABILITY' FACTORS THAT INFLUENCE ON THE PERFORMANCE IN RIFLE-SHOOTING

Abstract

The purpose of this study is to analyze the individual rifle-shooting sport technique of an international level shooter defining the factors of mechanical instability that have negative effects on the performance. Kinematic and stabilometric data were registered by means of a sonic digitiser synchronised with a force platform. Postural stability has been evaluated for ten intervals of the last five seconds of the aiming time. Multivariate analysis techniques allowed to identify two factors of 'postural instability' that explain the 78.8% of the total variability. Namely, 'instability of the segment pelvis during the 7th interval of the aiming time' and 'instability of the structure that form the rifle and the supporting it upper trunk during the final second of the aiming line'. The results provide objective information respect to the motor patterns in the rifle-shooting justifying the proposed theoretical model for the identification of the postural stability and its influence on the performance.