Kinematical analysis of bar trajectory in the Snatch, relating to performance

José Campos Granell

Juan J. Rabadé Espinosa

*Corresponding author: José Campos Granell jose.campos@uv.es

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Cite this article

Campos Granell, J., & Rabadé Espinosa, J. J. (2009). Kinematical analysis of bar trajectory in the Snatch, relating to performance. Apunts. Educación Física y Deportes, 96, 59-65.

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Abstract

The purpose of this study was to analyse the relationships between bar trajectory and foot displacement in the Snatch, and the differences in elite junior weightlifters of different performance level. Sample was a group of 31 men weightlifters from different weight categories. The comparative study included two groups, taking into account relative performance (weight lifted relative to body mass). 3D photogrammetry technique was utilized. Regarding group differences, we can conclude that lifters belonging to higher relative performance group are more efficient, as they manage to have a more barbell vertical trajectories and a minor horizontal displacement of the bar at the instant in which the bar reaches the maximum height and at the instant of catching (p: 0.030 and p: 0.005 respectively) and a minor backward horizontal displacement of the feet (p: 0,012). There are not differences between groups in the vertical displacement of the bar. These evidences should be taken into account in the individual technical training of young lifters.

Keywords: biomechanics, Coaching, Foot displacement, technique, weightlifting.

ISSN: 1577-4015

Published: April 01, 2009