Low chronic workload and the acute: chronic workload ratio are more predictive of injury than between-match recovery time: a two-season prospective cohort study in elite rugby league players
Article
Article Title | Low chronic workload and the acute: chronic workload ratio are more predictive of injury than between-match recovery time: a two-season prospective cohort study in elite rugby league players |
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ERA Journal ID | 9744 |
Article Category | Article |
Authors | Hulin, Billy T. (Author), Gabbett, Tim J. (Author), Caputi, Peter (Author), Lawson, Daniel W. (Author) and Sampson, John A. (Author) |
Journal Title | British Journal of Sports Medicine |
Journal Citation | 50 (16), pp. 1008-1012 |
Number of Pages | 5 |
Year | 2016 |
Publisher | BMJ |
Place of Publication | United Kingdom |
ISSN | 0306-3674 |
1473-0480 | |
Digital Object Identifier (DOI) | https://doi.org/10.1136/bjsports-2015-095364 |
Abstract | Background: Between-match recovery time, and acute and chronic workloads likely affect subsequent match-injury risk in elite rugby league players. Methods: Workloads of 28 players throughout two seasons were calculated during short (<7 days), and long (≥7 days) between-match recovery times. 'Acute' workloads (1 week) greater than 'chronic' workloads (4-week rolling average acute workload) resulted in acute:chronic workload ratios above 1. Results: No difference was found between the match-injury risk of short and long between-match recovery periods (7.5±2.5% vs 6.8±2.5%). When players had a short recovery between matches, high chronic workloads (18.9-22.0 km) were associated with a smaller risk of match injury than chronic workloads <18.9 km (relative risk (RR) range 0.27-0.32 (CI 0.08 to 0.92); likelihood range 90-95%, likely). Players who had shorter recovery and acute:chronic workload ratios ≥1.6, were 3.4-5.8 times likely to sustain a match injury than players with lower acute:chronic workload ratios (RR range 3.41-5.80 (CI 1.17 to 19.2); likelihood range 96-99%, very likely). Acute:chronic workload ratios between 1.2 and 1.6 during short between-match recovery times demonstrated a greater risk of match injury than ratios between 1.0 and 1.2 (RR=2.88 (CI 0.97 to 8.55); likelihood=92%, likely). Conclusions: Contrary to the philosophy that high workloads and shorter recovery equate to increased injury risk, our data suggest that high and very-high chronic workloads may protect against match injury following shorter between-match recovery periods. Acute:chronic workload ratios ∼1.5 are associated with a greater risk of match injury than lower acute:chonic workload ratios. Importantly, workloads can be manipulated to decrease the match-injury risk associated with shorter recovery time between matches. |
Keywords | fitness; global positioning system; injury; recovery; training; adult; athletic injuries; athletic performance; Australia; football; humans; male; prospective studies; recovery of function; return to sport; risk factors; time factors; workload; injury prevention |
ANZSRC Field of Research 2020 | 320225. Sports medicine |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Wollongong |
Australian Catholic University | |
BaiMed Physiotherapy and Sports Injury Clinic, Australia | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q438x/low-chronic-workload-and-the-acute-chronic-workload-ratio-are-more-predictive-of-injury-than-between-match-recovery-time-a-two-season-prospective-cohort-study-in-elite-rugby-league-players
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