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Kinematic and kinetic analysis of the goalkeeper's diving save in football.

Authors
  • Ibrahim, Rony1
  • Kingma, Idsart1
  • de Boode, Vosse A2
  • Faber, Gert S1
  • van Dieën, Jaap H1
  • 1 a Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences , Vrije Universiteit Amsterdam, Amsterdam Movement Science , Amsterdam , The Netherlands. , (Netherlands)
  • 2 b Adidas miCoach Performance Centre , AFC Ajax , Amsterdam , The Netherlands. , (Netherlands)
Type
Published Article
Journal
Journal of Sports Sciences
Publisher
Informa UK (Taylor & Francis)
Publication Date
Feb 01, 2019
Volume
37
Issue
3
Pages
313–321
Identifiers
DOI: 10.1080/02640414.2018.1499413
PMID: 30036138
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Kinetics and full body kinematics were measured in ten elite goalkeepers diving to save high and low balls at both sides of the goal, aiming to investigate their starting position, linear and angular momentum, and legs' contribution to end-performance. Our results showed that goalkeepers adopted a starting position with a stance width of 33 ± 1% of leg length, knee flexion angle of 62 ± 18° and hip flexion angle of 63 ± 18°. The contralateral leg contributed more than the ipsilateral leg to COM velocity (p < 0.01), both for the horizontal (2.7 ± 0.1 m·s-1 versus 1.2 ± 0.1 m·s-1) and for the vertical component (3.1 ± 0.3 m·s-1 versus 0.4 ± 0.2 m·s-1). Peak horizontal and peak angular momenta were significantly larger (p < 0.01) for low dives than for high dives with a mean difference of 55 kg·m·s-1 and 9 kg·m2·s-1, respectively. In addition, peak vertical momentum was significantly larger (p < 0.01) for high dives with a mean difference between dive heights of 113 kg·m·s-1. Coaches need to highlight horizontal lateral skills and exercises (e.g. sideward push-off, sideward jumps), with emphasis on pushing-off with the contralateral leg, when training and assessing goalkeeper's physical performance.

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