Fast bowlers in cricket demonstrate up to 3- to 4-week delay between high workloads and increased risk of injury.
BACKGROUND
Limited research in cricket bowlers and baseball pitchers has shown a correlation between workload and injury risk.


OBJECTIVE
Acute high bowling workload in cricket leads to increased risk of bowling injury in future matches.


METHODS
Cohort study (prognosis); Level of evidence, 2.


METHODS
One hundred twenty-nine pace (fast) bowlers who bowled in 2715 player matches over a period of 10 seasons were followed to compare overs bowled in each match and injury risk subsequent to the match.


RESULTS
Bowlers who bowled more than 50 overs in a match had an injury incidence in the next 21 days of 3.37 injuries per 1000 overs bowled, a significantly increased risk compared with those bowlers who bowled less than 50 overs (relative risk [RR], 1.77; 95% confidence interval [CI]: 1.05-2.98). Bowlers who bowled more than 30 overs in the second inning of a match had a significantly increased injury risk per over bowled in the next 28 days (RR, 2.42; 95% CI: 1.38-4.26). Time periods of less than 21 days or more than 28 days after the match in question did not yield significant differences in injury risk per over bowled between high and low workload bowlers.


CONCLUSIONS
High acute workload in cricket fast bowlers may lead to a somewhat delayed increased risk of injury up to 3 to 4 weeks after the acute overload, possibly via a mechanism of damaging immature (repair) tissue.


CONCLUSIONS
Cricket fast bowling and possibly baseball pitching workloads require scrutiny not just for acute injuries but also for injury prevention in the subsequent month.
Sports Medicine at Sydney University, Corner Western Avenue and Physics Road, University of Sydney, Sydney NSW 2006, Australia. johnorchard@msn.com.au
John W
JW
Orchard
Trefor
T
James
Marc
M
Portus
Alex
A
Kountouris
Rebecca
R
Dennis
D001265:Athletic Injuries / Q000145:classification / Q000453:epidemiology / Q000209:etiology*; D054874:Athletic Performance / Q000502:physiology*; D001315:Australia / Q000453:epidemiology; D015331:Cohort Studies; D006801:Humans; D008297:Male; D016017:Odds Ratio; D011446:Prospective Studies; D012146:Rest; D018570:Risk Assessment; D013177:Sports; D013997:Time Factors