Original Research ARTICLE
The Effect of Preparatory Posture on Goalkeeper’s Diving Save Performance in Football
- 1Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, VU University Amsterdam, Netherlands
- 2Independent researcher, Netherlands
Identifying the optimal preparatory posture of football goalkeepers can be very relevant for improving goalkeepers’ diving save performance, and coaching practices of technical and strength and conditioning coaches. This study aimed to analyse the effect of different starting stance widths and knee flexion angles on movement time, centre of mass (CoM) trajectory and velocity in goalkeepers’ diving saves. Ten elite goalkeepers performed dives from preferred (PT) and imposed postures, by altering knee angle (45°, 75° and 90°) and stance width (50%, 75% and 100% of leg length) independently at the starting position. The fastest dive movement time was observed when goalkeepers started from a stance width of 75% (SW75). CoM travelled a larger distance between contralateral and ipsilateral peak ground reaction forces in SW75 than PT (p<0.05). The goalkeepers were also more efficient in SW75, as a smaller countermovement and vertical velocity range were observed during high and low dives, respectively, from SW75 than PT (p<0.05). Thus, diving from a position with wider stance width than the preferred one leads to shorter movement time, and a faster and more direct CoM trajectory towards the ball.
Keywords: Biomechanics, stance width, Knee angle, Centre of Mass (CoM), Sports coaching
Received: 19 Apr 2019;
Accepted: 06 Aug 2019.
Edited by:Matt Brughelli, Auckland University of Technology, New Zealand
Reviewed by:Scott R. Brown, University of Michigan, United States
Chris Whatman, Auckland University of Technology, New Zealand
Copyright: © 2019 Ibrahim, Kingma, de Boode, Faber and van Dieën. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Dr. Idsart Kingma, Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, VU University Amsterdam, Amsterdam, Netherlands, firstname.lastname@example.org