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Sports 2018, 6(2), 33; https://doi.org/10.3390/sports6020033

The Influence of Fatigued Core Muscles on Head Acceleration during Headers in Soccer

1
Department of Sport Science, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
2
Chirurgisch-Orthopädisches Zentrum, 66557 Illingen, Germany
*
Author to whom correspondence should be addressed.
Received: 26 March 2018 / Revised: 4 April 2018 / Accepted: 9 April 2018 / Published: 11 April 2018
(This article belongs to the Special Issue Fatigue and Recovery in Football)
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Abstract

The core muscles play a central role in stabilizing the head during headers in soccer. The objective of this study was to examine the influence of a fatigued core musculature on the acceleration of the head during jump headers and run headers. Acceleration of the head was measured in a pre-post-design in 68 soccer players (age: 21.5 ± 3.8 years, height: 180.0 ± 13.9 cm, weight: 76.9 ± 8.1 kg). Data were recorded by means of a telemetric 3D acceleration sensor and with a pendulum header. The treatment encompassed two exercises each for the ventral, lateral, and dorsal muscle chains. The acceleration of the head between pre- and post-test was reduced by 0.3 G (p = 0.011) in jump headers and by 0.2 G (p = 0.067) in run headers. An additional analysis of all pretests showed an increased acceleration in run headers when compared to stand headers (p < 0.001) and jump headers (p < 0.001). No differences were found in the sub-group comparisons: semi-professional vs. recreational players, offensive vs. defensive players. Based on the results, we conclude that the acceleration of the head after fatiguing the core muscles does not increase, which stands in contrast to postulated expectations. More tests with accelerated soccer balls are required for a conclusive statement. View Full-Text
Keywords: heading; fatigue; concussion; soccer; acceleration; kinetics; repetitive head impacts; cumulative exposure heading; fatigue; concussion; soccer; acceleration; kinetics; repetitive head impacts; cumulative exposure
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Becker, S.; Fröhlich, M.; Kelm, J.; Ludwig, O. The Influence of Fatigued Core Muscles on Head Acceleration during Headers in Soccer. Sports 2018, 6, 33.

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