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Article

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Title

Within-Subject Principal Component Analysis of External Training Load and Intensity Measures in Youth Soccer Training

Authors

[ 1 ] Instytut Informatyki, Wydział Informatyki i Telekomunikacji, Politechnika Poznańska | [ P ] employee | [ S ] student

Scientific discipline (Law 2.0)

[2.3] Information and communication technology

Year of publication

2023

Published in

Journal of Strength and Conditioning Research

Journal year: 2023 | Journal volume: vol. 37 | Journal number: no. 12

Article type

scientific article

Publication language

english

Abstract

EN The aim of this study was to identify which combination of external training load (EL) and external intensity (EI) metrics during youth soccer training sessions captured similar or unique information. Data were collected from 18 youth soccer players during an 18-week in-season competition period using a 10-Hz global positioning system, rating of perceived exertion (RPE), and session-RPE (sRPE). External training load measures included total distance (TD, in meters), PlayerLoad (PL, in arbitrary units), high-speed running distance (HSR, in meters), and number of accelerations (ACC, n). All EL metrics were also divided by session duration (minutes) to obtain EI values. A total of 804 training observations were undertaken (43 ± 17 sessions per player). The analysis was performed by use of the principal component analysis technique. The first principal component (PC) captured 49–70% and 68–89% of the total variance in EI and EL, respectively. The findings show that from the 5 EI metrics, most of the information can be explained by either TD per minute or PL per minute, with a loading from 0.87 to 0.98 and from 0.76 to 0.95, respectively. The majority of EL information can be explained by PL (loading: 0.93–0.98), TD (loading: 0.95–0.99), ACC (loading: 0.71–0.91), or sRPE (loading: 0.70–0.93). The second PC for EL metrics is most strongly correlated with HSR, with loadings from 0.53 to 0.84. The results suggest that the majority of the information contained in the EL variables can be captured in 1 PC without losing much information. The findings suggest that stakeholders who intend to provide a fast and holistic view of EL information in a daily training environment should report TD, PL, ACC, or sRPE plus HSR to coaching staff as a metrics that provides additional unique information.

Pages (from - to)

2411 - 2416

DOI

10.1519/JSC.0000000000004545

URL

https://journals.lww.com/nsca-jscr/abstract/2023/12000/within_subject_principal_component_analysis_of.13.aspx?context=latestarticles

Ministry points / journal

100

Impact Factor

2,5

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