Wearable Inertial Measurement Unit to Accelerometer-Based Training Monotony and Strain during a Soccer Season: A within-Group Study for Starters and Non-Starters

Nobari, Hadi; Sögüt, Mustafa; Oliveira, Rafael; Pérez-Gómez, Jorge; Suzuki, Katsuhiko; Zouhal, Hassane

doi:10.3390/ijerph18158007

Open AccessFeature PaperArticle

Wearable Inertial Measurement Unit to Accelerometer-Based Training Monotony and Strain during a Soccer Season: A within-Group Study for Starters and Non-Starters

by

Hadi Nobari

^1,2,3,4,*

,

Mustafa Sögüt

⁵

,

Rafael Oliveira

^6,7,8

,

Jorge Pérez-Gómez

^2,*

,

Katsuhiko Suzuki

^9,*

and

Hassane Zouhal

^10,*

¹

Department of Physical Education and Sports, University of Granada, 18010 Granada, Spain

²

HEME Research Group, Faculty of Sport Sciences, University of Extremadura, 10003 Cáceres, Spain

³

Department of Exercise Physiology, Faculty of Sport Sciences, University of Isfahan, Isfahan 81746-7344, Iran

⁴

Sports Scientist, Sepahan Football Club, Isfahan 81887-78473, Iran

⁵

Department of Physical Education and Sports, Faculty of Education, Middle East Technical University, 06800 Ankara, Turkey

⁶

ESDRM-IPS-Sports Science School of Rio Maior—Polytechnic Institute of Santarém, 2040-413 Rio Maior, Portugal

⁷

Research Center in Sport Sciences, Health Sciences and Human Development, Quinta de Prados, Edifício Ciências de Desporto, 5001-801 Vila Real, Portugal

⁸

Life Quality Research Centre, Complexo Andaluz, Apartado, 2040-413 Rio Maior, Portugal

⁹

Faculty of Sport Sciences, Waseda University, Tokorozawa 359-1192, Japan

¹⁰

Movement, Sport, Health and Sciences Laboratory (M2S), University of Rennes 2, F-35000 Rennes, France

^*

Authors to whom correspondence should be addressed.

Int. J. Environ. Res. Public Health 2021, 18(15), 8007; https://doi.org/10.3390/ijerph18158007

Submission received: 17 June 2021 / Revised: 23 July 2021 / Accepted: 26 July 2021 / Published: 28 July 2021

(This article belongs to the Special Issue 2nd Edition: Fitness Assessment, Athlete’s Monitoring Cycle and Training Interventions in Team Sports)

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Abstract

The purpose of this study was to analyze the intragroup differences in weekly training monotony (TM) and training strain (TS) between starter and non-starter male professional soccer players at accelerometry based variables throughout the periods of a season. TM and TS of different accelerations and decelerations zones for twenty-one players were followed for forty-eight weeks. Regardless of group, players obtained the highest mean TM (starters = 3.3 ± 0.6, non-starters = 2.2 ± 1.1, in arbitrary unit, AU) and TS (starters = 1288.9 ± 265.2, non-starters = 765.4 ± 547.5, AU) scores in the pre-season for accelerations at Zone 1 (<2 m/s²). The results also indicated that both groups exhibited similar TM and TS scores in accelerations at Zones 2 (2 to 4 m/s²) and 3 (>4 m/s²) across the entire season. While the starters showed the highest TM and TS scores at deceleration Zone 1 (<−2 m/s²) in the end-season, the non-starters exhibited the highest scores at the deceleration Zone 1 in pre-season. It seems that in pre-season, coaches applied higher levels of training with greater emphasis on deceleration for non-starters. This tendency was reduced over time for non-starters, while starters presented higher values of deceleration Zone 1. These results highlight the variations in TM and TS across the different periods of a full season according to match starting status among professional soccer players, and the results suggest that non-starter players should receive higher levels of load to compensate for non-participation in matches throughout a soccer season.

Keywords: football; external training load; WIMU; GPS; acceleration; deceleration

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MDPI and ACS Style

Nobari, H.; Sögüt, M.; Oliveira, R.; Pérez-Gómez, J.; Suzuki, K.; Zouhal, H. Wearable Inertial Measurement Unit to Accelerometer-Based Training Monotony and Strain during a Soccer Season: A within-Group Study for Starters and Non-Starters. Int. J. Environ. Res. Public Health 2021, 18, 8007. https://doi.org/10.3390/ijerph18158007

AMA Style

Nobari H, Sögüt M, Oliveira R, Pérez-Gómez J, Suzuki K, Zouhal H. Wearable Inertial Measurement Unit to Accelerometer-Based Training Monotony and Strain during a Soccer Season: A within-Group Study for Starters and Non-Starters. International Journal of Environmental Research and Public Health. 2021; 18(15):8007. https://doi.org/10.3390/ijerph18158007

Chicago/Turabian Style

Nobari, Hadi, Mustafa Sögüt, Rafael Oliveira, Jorge Pérez-Gómez, Katsuhiko Suzuki, and Hassane Zouhal. 2021. "Wearable Inertial Measurement Unit to Accelerometer-Based Training Monotony and Strain during a Soccer Season: A within-Group Study for Starters and Non-Starters" International Journal of Environmental Research and Public Health 18, no. 15: 8007. https://doi.org/10.3390/ijerph18158007

APA Style

Nobari, H., Sögüt, M., Oliveira, R., Pérez-Gómez, J., Suzuki, K., & Zouhal, H. (2021). Wearable Inertial Measurement Unit to Accelerometer-Based Training Monotony and Strain during a Soccer Season: A within-Group Study for Starters and Non-Starters. International Journal of Environmental Research and Public Health, 18(15), 8007. https://doi.org/10.3390/ijerph18158007

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Wearable Inertial Measurement Unit to Accelerometer-Based Training Monotony and Strain during a Soccer Season: A within-Group Study for Starters and Non-Starters

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