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Sports Medicine
Erschienen in: Sports Medicine 9/2020

22.06.2020 | Systematic Review

Is the Acute: Chronic Workload Ratio (ACWR) Associated with Risk of Time-Loss Injury in Professional Team Sports? A Systematic Review of Methodology, Variables and Injury Risk in Practical Situations

verfasst von: Renato Andrade, Eirik Halvorsen Wik, Alexandre Rebelo-Marques, Peter Blanch, Rodney Whiteley, João Espregueira-Mendes, Tim J. Gabbett

Erschienen in: Sports Medicine | Ausgabe 9/2020

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Abstract

Background

The acute: chronic workload ratio (ACWR) is an index of the acute workload relative to the cumulative chronic workloads. The monitoring of physical workloads using the ACWR has emerged and been hypothesized as a useful tool for coaches and athletes to optimize performance while aiming to reduce the risk of potentially preventable load-driven injuries.

Objectives

Our goal was to describe characteristics of the ACWR and investigate the association of the ACWR with the risk of time-loss injuries in adult elite team sport athletes.

Data sources

PubMed, EMBASE and grey literature databases; inception to May 2019.

Eligibility criteria

Longitudinal studies that assess the relationship of the ACWR and time-loss injury risk in adult professional or elite team sports.

Methods

We summarized the population characteristics, workload metrics and ACWR calculation methods. For each workload metric, we plotted the risk estimates for the ACWR in isolation, or when combined with chronic workloads. Methodological quality was assessed using a modified version of the Downs and Black scale.

Results

Twenty studies comprising 2375 injuries from 1234 athletes (all males and mean age of 24 years) from different sports were included. Internal (65%) and external loads (70%) were collected in more than half of the studies and the session-rating of perceived exertion and total distance were the most commonly collected metrics. The ACWR was commonly calculated using the coupled method (95%), 1:4 weekly blocks (95%) and subsequent week injury lag (80%). There were 14 different binning methods with almost none of the studies using the same binning categories.

Conclusion

The majority of studies suggest that athletes are at greater risk of sustaining a time-loss injury when the ACWR is higher relative to a lower or moderate ACWR. The heterogenous methodological approaches not only reflect the wide range of sports studied and the differing demands of these activities, but also limit the strength of recommendations.

PROSPERO registration number

CRD42017067585.
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Metadaten
Titel
Is the Acute: Chronic Workload Ratio (ACWR) Associated with Risk of Time-Loss Injury in Professional Team Sports? A Systematic Review of Methodology, Variables and Injury Risk in Practical Situations
verfasst von
Renato Andrade
Eirik Halvorsen Wik
Alexandre Rebelo-Marques
Peter Blanch
Rodney Whiteley
João Espregueira-Mendes
Tim J. Gabbett
Publikationsdatum
22.06.2020
Verlag
Springer International Publishing
Erschienen in
Sports Medicine / Ausgabe 9/2020
Print ISSN: 0112-1642
Elektronische ISSN: 1179-2035
DOI
https://doi.org/10.1007/s40279-020-01308-6

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