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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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  • Hadi Nobari

    (Department of Physical Education and Sports, University of Granada, 18010 Granada, Spain
    HEME Research Group, Faculty of Sport Sciences, University of Extremadura, 10003 Cáceres, Spain
    Department of Exercise Physiology, Faculty of Sport Sciences, University of Isfahan, Isfahan 81746-7344, Iran
    Sports Scientist, Sepahan Football Club, Isfahan 81887-78473, Iran)

  • Mustafa Sögüt

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

  • Rafael Oliveira

    (ESDRM-IPS-Sports Science School of Rio Maior—Polytechnic Institute of Santarém, 2040-413 Rio Maior, Portugal
    Research Center in Sport Sciences, Health Sciences and Human Development, Quinta de Prados, Edifício Ciências de Desporto, 5001-801 Vila Real, Portugal
    Life Quality Research Centre, Complexo Andaluz, Apartado, 2040-413 Rio Maior, Portugal)

  • Jorge Pérez-Gómez

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

  • Katsuhiko Suzuki

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

  • Hassane Zouhal

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

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/s 2 ). The results also indicated that both groups exhibited similar TM and TS scores in accelerations at Zones 2 (2 to 4 m/s 2 ) and 3 (>4 m/s 2 ) across the entire season. While the starters showed the highest TM and TS scores at deceleration Zone 1 (<−2 m/s 2 ) 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.

Suggested Citation

  • Hadi Nobari & Mustafa Sögüt & Rafael Oliveira & Jorge Pérez-Gómez & Katsuhiko Suzuki & 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," IJERPH, MDPI, vol. 18(15), pages 1-12, July.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:15:p:8007-:d:603643
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    References listed on IDEAS

    as
    1. Hadi Nobari & Luis Felipe Tubagi Polito & Filipe Manuel Clemente & Jorge Pérez-Gómez & Mina Ahmadi & Miguel Ángel Garcia-Gordillo & Ana Filipa Silva & Jose Carmelo Adsuar, 2020. "Relationships Between Training Workload Parameters with Variations in Anaerobic Power and Change of Direction Status in Elite Youth Soccer Players," IJERPH, MDPI, vol. 17(21), pages 1-15, October.
    2. Hadi Nobari & Sara Mahmoudzadeh Khalili & Rafael Oliveira & Alfonso Castillo-Rodríguez & Jorge Pérez-Gómez & Luca Paolo Ardigò, 2021. "Comparison of Official and Friendly Matches through Acceleration, Deceleration and Metabolic Power Measures: A Full-Season Study in Professional Soccer Players," IJERPH, MDPI, vol. 18(11), pages 1-9, June.
    3. Rafael Oliveira & João Paulo Brito & Nuno Loureiro & Vítor Padinha & Hadi Nobari & Bruno Mendes, 2021. "Will Next Match Location Influence External and Internal Training Load of a Top-Class Elite Professional European Soccer Team?," IJERPH, MDPI, vol. 18(10), pages 1-15, May.
    4. Hadi Nobari & Rafael Oliveira & Filipe Manuel Clemente & Jose Carmelo Adsuar & Jorge Pérez-Gómez & Jorge Carlos-Vivas & João Paulo Brito, 2020. "Comparisons of Accelerometer Variables Training Monotony and Strain of Starters and Non-Starters: A Full-Season Study in Professional Soccer Players," IJERPH, MDPI, vol. 17(18), pages 1-14, September.
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