Spikes in acute:chronic workload ratio (ACWR) associated with a 5-7 times greater injury rate in English Premier League football players: a comprehensive 3-year study

British Journal of Sports Medicine
Laura BowenFrançois-Xavier Li

Abstract

We examined the relation between global positioning system (GPS)-derived workloads and injury in English Premier League football players (n=33) over three seasons. Workload and injury data were collected over three consecutive seasons. Cumulative (1-weekly, 2-weekly, 3-weekly and 4-weekly) loads in addition to acute:chronic workload ratios (ACWR) (acute workload (1-week workload)) divided by chronic workload (previous 4-week average acute workload) were classified into discrete ranges by z-scores. Relative risk (RR) for each range was then calculated between injured and non-injured players using specific GPS variables: total distance, low-intensity distance, high-speed running distance, sprint distance, accelerations and decelerations. The greatest non-contact injury risk was when the chronic exposure to decelerations was low (<1731) and the ACWR was >2.0 (RR=6.7). Non-contact injury risk was also 5-6 times higher for accelerations and low-intensity distance when the chronic workloads were categorised as low and the ACWR was >2.0 (RR=5.4-6.6), compared with ACWRs below this. When all chronic workloads were included, an ACWR >2.0 was associated with a significant but lesser injury risk for the same metrics, plus total distance (...Continue Reading

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Citations

Feb 1, 2020·The American Journal of Sports Medicine·April L McPhersonTimothy E Hewett
Oct 31, 2019·Scandinavian Journal of Medicine & Science in Sports·Lorenzo LolliNicol van Dyk
Sep 3, 2020·European Journal of Sport Science·Victor Moreno-PérezBabette M Pluim
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Software Mentioned

StatSports
GPS
SPSS Statistics
Viper
MedCalc

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