当前位置： SCI文献检索 > JOURNAL OF SCIENCE AND MEDICINE IN SPORT期刊下所有文献 > Bowling loads and injury risk in male first class county cricket: Is 'differential load' an alternative to the acute-to-chronic workload ratio?

Bowling loads and injury risk in male first class county cricket: Is 'differential load' an alternative to the acute-to-chronic workload ratio?

Abstract：

OBJECTIVES:Methodological concerns relating to acute-to-chronic workload ratios (ACWR) have been raised. This study aimed to assess the relationship between an alternative predictor variable named 'differential load', representing the smoothed week-to-week rate change in load, and injury risk in first class county cricket (FCCC) fast bowlers. DESIGN:Prospective cohort study. METHODS:Bowling loads and injuries were recorded for 49 professional male fast bowlers from six FCCC teams. A range of differential loads and ACWRs were calculated and subjected to a variable selection procedure. RESULTS:Exponentially-weighted 7-day differential load, 9:21-day ACWR, 42-day chronic load, and 9-day acute load were the best-fitting predictor variables in their respective categories. From these, a generalized linear mixed-effects model combining 7-day differential load, 42-day chronic load, and 9-day acute load provided the best model fit. A two-standard deviation (2SD) increase in 7-day differential load (22 overs) was associated with a substantial increase in injury risk (risk ratio [RR]=2.47, 90% CI: 1.27-4.80, most likely harmful), and a 2SD increase in 42-day chronic load (17.5 overs/week) was associated with a most likely harmful increase in injury risk (RR=6.77, 90% CI: 2.15-21.33). For 9-day acute load, very low values (≤1 over/week) were associated with a most likely higher risk of injury versus moderate (17.5 overs/week; RR: 15.50, 90% CI: 6.19-38.79) and very high 9-day acute loads (45.5 overs/week; RR: 133.33, 90% CI: 25.26-703.81). CONCLUSIONS:Differential loads may be used to identify potentially harmful spikes in load, whilst mitigating methodological issues associated with ACWRs.

journal_name

J Sci Med Sport

journal_title

Journal of science and medicine in sport

authors

Tysoe A,Moore IS,Ranson C,McCaig S,Williams S

doi

10.1016/j.jsams.2020.01.004

subject

Has Abstract

pub_date

2020-06-01 00:00:00

pages

569-573

issue

6

eissn

1440-2440

issn

1878-1861

pii

S1440-2440(19)31356-8

journal_volume

23

pub_type

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