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Open AccessArticle

Effect of Playing Position, Match Half, and Match Day on the Trunk Inclination, G-Forces, and Locomotor Efficiency Experienced by Elite Soccer Players in Match Play

1
Health Research Centre, University of Almería, 04120 Almería, Spain
2
Faculty of Computer Science, Multimedia and Telecommunications, Universitat Oberta de Catalunya, 08018 Barcelona, Spain
3
Unión Deportiva Almería, 04007 Almería, Spain
4
Laboratory of Kinesiology, Biomechanics and Ergonomics (KIBIOMER Lab.), Research Central Services, University of Almería, 04120 Almería, Spain
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(20), 5814; https://doi.org/10.3390/s20205814
Received: 16 September 2020 / Revised: 8 October 2020 / Accepted: 9 October 2020 / Published: 14 October 2020
The rapid growth of wearable sensors has allowed the analysis of trunk kinematics during the match, which is necessary for having a better understanding of the postural demands of soccer players. However, some contextual variables may have an impact on the physical demands of the players. This study aimed to analyze the effect of three contextual variables (playing position, match half, and match day) on the sagittal trunk inclination, G-forces, and locomotor efficiency experienced by soccer players in match play. Then, wearable sensors were used to collect the trunk kinematics during 13 matches. Firstly, positional differences were found on the trunk inclination (p = 0.01) and the G-forces experienced by the players (p < 0.001). For example, the greatest and lowest trunk inclination was found for FW (~34.01°) and FB (~28.85°) while the greatest and lowest G-forces were found for WMF (1.16 G) and CD (1.12 G), respectively. However, there were no positional differences in the locomotor efficiency (p = 0.10). Secondly, the match half had a significant effect on the trunk inclination (p = 0.01) and the G-forces experienced by the players (p < 0.001) with significantly lower values observed during the second half. No differences between halves were found on the locomotor efficiency for any playing position (p = 0.41). Finally, no significant effect of match day on any variable was observed. This investigation is one of the first steps towards enhancing the understanding of trunk kinematics from elite soccer players. The positional differences found on the trunk inclination and G-forces imply that the development of position-specific training drills considering the postural demands is necessary to prepare the players not only for the physical demands but also for successful performance in the field of regard. The resistance to fatigue needs to be trained given the differences between halves. View Full-Text
Keywords: football; posture; match analysis; load; team sports; inertial measurement units football; posture; match analysis; load; team sports; inertial measurement units
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MDPI and ACS Style

Oliva-Lozano, J.M.; Maraver, E.F.; Fortes, V.; Muyor, J.M. Effect of Playing Position, Match Half, and Match Day on the Trunk Inclination, G-Forces, and Locomotor Efficiency Experienced by Elite Soccer Players in Match Play. Sensors 2020, 20, 5814. https://doi.org/10.3390/s20205814

AMA Style

Oliva-Lozano JM, Maraver EF, Fortes V, Muyor JM. Effect of Playing Position, Match Half, and Match Day on the Trunk Inclination, G-Forces, and Locomotor Efficiency Experienced by Elite Soccer Players in Match Play. Sensors. 2020; 20(20):5814. https://doi.org/10.3390/s20205814

Chicago/Turabian Style

Oliva-Lozano, José M.; Maraver, Elisa F.; Fortes, Víctor; Muyor, José M. 2020. "Effect of Playing Position, Match Half, and Match Day on the Trunk Inclination, G-Forces, and Locomotor Efficiency Experienced by Elite Soccer Players in Match Play" Sensors 20, no. 20: 5814. https://doi.org/10.3390/s20205814

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