A novel application of entropy analysis for assessing changes in movement variability during cumulative tackles in young elite rugby league players.
Dynamical systems
Measurement
Motor Control
Team Sport
Technology
Journal
Biology of sport
ISSN: 0860-021X
Titre abrégé: Biol Sport
Pays: Poland
ID NLM: 8700872
Informations de publication
Date de publication:
Jan 2023
Jan 2023
Historique:
received:
26
04
2021
revised:
03
07
2021
accepted:
28
12
2021
entrez:
13
1
2023
pubmed:
14
1
2023
medline:
14
1
2023
Statut:
ppublish
Résumé
The aim of this study was to identify between-position (forwards vs. backs) differences in movement variability in cumulative tackle events training during both attacking and defensive roles. Eleven elite adolescent male rugby league players volunteered to participate in this study (mean ± SD, age; 18.5 ± 0.5 years, height; 179.5 ± 5.0 cm, body mass; 88.3 ± 13.0 kg). Participants performed a drill encompassing four blocks of six tackling (i.e. tackling an opponent) and six tackled (i.e. being tackled by an opponent while carrying a ball) events (i.e. 48 total tackles) while wearing a micro-technological inertial measurement unit (WIMU, Realtrack Systems, Spain). The acceleration data were used to calculate sample entropy (SampEn) to analyse the movement variability during tackles performance. In tackling actions SampEn showed significant between-position differences in block 1 (p = 0.0001) and block 2 (p = 0.0003). Significant between-block differences were observed in backs (block 1 vs 3, p = 0,0021; and block 1 vs 4, p = 0,0001) but not in forwards. When being tackled, SampEn showed significant between-position differences in block 1 (p = 0.0007) and block 3 (p = 0.0118). Significant between-block differences were only observed for backs in block 1 vs 4 (p = 0,0025). Movement variability shows a progressive reduction with cumulative tackle events, especially in backs and when in the defensive role (tackling). Forwards present lower movement variability values in all blocks, particularly in the first block, both in the attacking and defensive role. Entropy measures can be used by practitioners as an alternative tool to analyse the temporal structure of variability of tackle actions and quantify the load of these actions according to playing position.
Identifiants
pubmed: 36636175
doi: 10.5114/biolsport.2023.112965
pii: 112965
pmc: PMC9806745
doi:
Types de publication
Journal Article
Langues
eng
Pagination
161-170Informations de copyright
Copyright © Biology of Sport 2023.
Déclaration de conflit d'intérêts
The authors declare no conflict of interest.
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