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Quantifying technical actions in professional soccer using foot-mounted inertial measurement units

Marris, Joshua; Barrett, Steve; Abt, Grant; Towlson, Chris

Authors

Joshua Marris

Steve Barrett



Abstract

Objectives: This study aimed to (i) establish the concurrent validity and intra-unit reliability of a foot-mounted inertial measurement unit for monitoring soccer technical actions, (ii) quantify the within-microcycle inter-positional differences in the technical actions of professional soccer training, and (iii) determine the influence of drill category on the technical actions of professional soccer training. Methods: Twenty-one professional soccer players’ technical performance data (ball touches, releases, ball touches per minute, releases per minute), collected during training sessions throughout twenty-four weekly microcycles, were analysed using general linear modelling. Results: The inertial measurement unit exhibited good concurrent validity (PA=95.1%–100.0%) and intra-unit reliability (PA=95.9%–96.9%, CV=1.4%–2.9%) when compared with retrospective video analyses. The most ball touches ((Formula presented.) = 218.0) and releases ((Formula presented.) = 110.8) were observed on MD–1, with MD–5 eliciting the highest frequency of ball touches ((Formula presented.) = 3.8) and releases ((Formula presented.) = 1.7) per minute. Central midfielders performed the most ball touches ((Formula presented.) = 221.9), releases ((Formula presented.) = 108.3), ball touches per minute ((Formula presented.) = 3.4) and releases per minute ((Formula presented.) = 1.6). Small-sided games evoked more ball touches ((Formula presented.) diff= 1.5) and releases per minute ((Formula presented.) diff= 0.1) than previously reported in match-play. The fewest ball touches ((Formula presented.) = 1.2) and releases per minute ((Formula presented.) = 0.5) were observed during tactical drills. Conclusion: The results of this study provide a novel understanding of the within-microcycle, inter-positional and drill category differences in the technical actions performed by professional players during training.

Citation

Marris, J., Barrett, S., Abt, G., & Towlson, C. (2021). Quantifying technical actions in professional soccer using foot-mounted inertial measurement units. Science and Medicine in Football, https://doi.org/10.1080/24733938.2021.1910333

Journal Article Type Article
Acceptance Date Mar 19, 2021
Online Publication Date Mar 29, 2021
Publication Date 2021
Deposit Date Jun 25, 2021
Publicly Available Date Mar 30, 2022
Journal Science and Medicine in Football
Print ISSN 2473-3938
Electronic ISSN 2473-4446
Publisher Taylor & Francis
Peer Reviewed Peer Reviewed
DOI https://doi.org/10.1080/24733938.2021.1910333
Keywords Professional soccer training; technical actions; player monitoring; microcycle; microtechnology
Public URL https://hull-repository.worktribe.com/output/3747148