Evidence map›Paper›PMID 34052983›Full record

ArticleSports medicine (Auckland, N.Z.)2021

The Association Between the Acute:Chronic Workload Ratio and Running-Related Injuries in Dutch Runners: A Prospective Cohort Study.

Gustavo Nakaoka, Saulo Delfino Barboza, Evert Verhagen, Willem van Mechelen, Luiz Hespanhol

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In one paragraph

Article in Sports medicine (Auckland, N.Z.), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Gustavo NakaokaMasters and Doctoral Programs in Physical Therapy , Universidade Cidade de São Paulo (UNICID), Rua Cesário Galeno 448, Tatuapé, São Paulo, SP, 03071-100, Brazil. gustavo.nakaoka@gmail.com.ORCID http://orcid.org/0000-0001-8673-7246
Saulo Delfino BarbozaMaster Program in Health and Education , University of Ribeirão Preto, São Paulo, Brazil.ORCID http://orcid.org/0000-0003-3285-7079
Evert VerhagenDepartment of Public and Occupational Health (DPOH), Amsterdam Public Health Research Institute (APH), Amsterdam Universities Medical Centers, Location VU University Medical Center Amsterdam (VUmc), Amsterdam, The Netherlands.ORCID http://orcid.org/0000-0001-9227-8234
Willem van MechelenDepartment of Public and Occupational Health (DPOH), Amsterdam Public Health Research Institute (APH), Amsterdam Universities Medical Centers, Location VU University Medical Center Amsterdam (VUmc), Amsterdam, The Netherlands.ORCID http://orcid.org/0000-0001-7136-6382
Luiz HespanholMasters and Doctoral Programs in Physical Therapy , Universidade Cidade de São Paulo (UNICID), Rua Cesário Galeno 448, Tatuapé, São Paulo, SP, 03071-100, Brazil.ORCID http://orcid.org/0000-0003-1774-4746

Funding

Fundação de Amparo à Pesquisa do Estado de São Paulo 2016/09220-1
6 · The paper itself

Abstract

objectiveTo investigate the association between the acute:chronic workload ratio (ACWR) and running-related injuries (RRI).

methodsThis is a secondary analysis using a database composed of data from three studies conducted with the same RRI surveillance system. Longitudinal data comprising running exposure (workload) and RRI were collected biweekly during the respective cohorts' follow-up (18-65 weeks). ACWR was calculated as the most recent (i.e., acute) external workload (last 2 weeks) divided by the average external (i.e., chronic) workload of the last 4, 6, 8, 10 and 12 weeks. Three methods were used to calculate the ACWR: uncoupled, coupled and exponentially weighted moving averages (EWMA). Bayesian logistic mixed models were used to analyse the data.

resultsThe sample was composed of 435 runners. Runners whose ACWR was under 0.70 had about 10% predicted probability of sustaining RRI (9.6%; 95% credible interval [CrI] 7.5-12.4), while those whose ACWR was higher than 1.38 had about 1% predicted probability of sustaining RRI (1.3%; 95% CrI 0.7-1.7). The association between the ACWR and RRI was significant, varying from a small to a moderate association (1-10%). The higher the ACWR, the lower the RRI risk.

conclusionsThe ACWR showed an inversely proportional association with RRI risk that can be represented by a smooth L-shaped, second-order, polynomial decay curve. The ACWR using hours or kilometres yielded similar results. The coupled and uncoupled methods revealed similar associations with RRIs. The uncoupled method presented the best discrimination for ACWR strata. The EWMA method yielded sparse and non-significant results.

Indexed as

Athletic InjuriesRunningBayes TheoremHumansProspective StudiesWorkload

Identifiers

PMID34052983

What OpenQuestion holds

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.