Wearable Inertial Measurement Unit to Measure External Load: A Full-Season Study in Professional Soccer Players Nobari, Hadi Football External load monitoring Performance GPS WIMU Sport science This work is funded by Fundacao para a Ciencia e Tecnologia/ Ministerio da Ciencia, Tecnologia e Ensino Superior through national funds and when applicable co-funded EU funds under the project UIDB/50008/2020. The aim of this study was to describe weekly acute workload (wAW), chronic workload (wCW), acute: chronic workload ratio (wACWR), training monotony (wTM), and training strain (wTS) variations over a full season across playing positions. Twenty-one professional soccer players were daily monitored during 48 consecutive weeks. Total distance, sprint total distance (STD), highspeed running distance (HSRd), maximum speed, number of the repeated sprints, and body load (BL) were obtained during training and matches using aWearable Inertial Measurement Unit. The wAW was determined for each external load measure. The wCW, wACWR, and wTM were calculated based on BL metric. Higher values of weekly STD were observed in lateral defenders/wingers (LDW) compared to central defenders/forwards (CDF) (p = 0.009; ES = Large) and midfielders (MDF) (p = 0.034; ES = Large). Additionally, weekly HSRd was higher in LDW vs. CDF (p = 0.016; ES = Large) and MDF (p = 0.011; ES = Large). The CDF presented a lower weekly number of repeated sprints than LDW (p = 0.021; ES = Large). In conclusion, weekly external load metrics were position-dependent over the season. Moreover, LDW a presented greater weekly STD, HSRd, and number of repeated sprints compared to other positions. 2022-03-07T13:12:12Z 2022-03-07T13:12:12Z 2022-01-21 journal article Nobari, H... [et al.]. Wearable Inertial Measurement Unit to Measure External Load: A Full-Season Study in Professional Soccer Players. Appl. Sci. 2022, 12, 1140. [https://doi.org/10.3390/app12031140] http://hdl.handle.net/10481/73195 10.3390/app12031140 eng http://creativecommons.org/licenses/by/3.0/es/ open access AtribuciĆ³n 3.0 EspaƱa MDPI