Article Text

PDF
MRI bone marrow oedema precedes lumbar bone stress injury diagnosis in junior elite cricket fast bowlers
  1. Alex Kountouris1,2,
  2. Kevin Sims1,
  3. David Beakley1,
  4. Anna E Saw1,
  5. John Orchard1,3,
  6. Andrew Rotstein4,
  7. Jill L Cook2
  1. 1Cricket Australia, Brisbane, Queensland, Australia
  2. 2La Trobe Sport and Exercise Medicine Research Centre, La Trobe University, Melbourne, Victoria, Australia
  3. 3School of Public Health, University of Sydney, Sydney, New South Wales, Australia
  4. 4Victoria House Medical Imaging, Melbourne, Victoria, Australia
  1. Correspondence to Dr Alex Kountouris, National Cricket Centre, Cricket Australia, Brisbane, QLD 4010, Australia; alex.kountouris{at}cricket.com.au

Abstract

Objectives Lumbar bone stress injury (‘bone stress injury’) is common in junior fast bowlers. The repetitive loading of cricket fast bowling may cause bone marrow oedema (BMO), detectable on MRI, before the bowler suffers from symptomatic bone stress injury. We investigated the temporal relationship between BMO, bone stress injury, along with bowling workload correlates, in elite junior fast bowlers throughout a cricket season.

Methods 65 junior fast bowlers were prospectively monitored for one 8-month cricket season. For research purposes, participants had up to six MRI scans at set times in the season; findings were withheld from them and their clinicians. Standard practices for bowling workload monitoring and injury diagnosis were followed.

Results 15 (23%) participants developed bone stress injury during the study. All 15 of these participants had BMO detected on at least one of the preceding MRI scans, including the scan immediately prior to diagnosis. The risk of BMO progressing to bone stress injury during the season was greatest for participants with BMO present 2 weeks prior to the national championship tournament (period of high load) (RR=18.9, OR=44.8). Both bone stress injury and BMO were associated with bowling a higher percentage of days in training and having a shorter bowling break during the season. The number of balls bowled and acute-to-chronic workload were not associated with imaging abnormalities or injury.

Conclusion The presence of BMO on MRI in asymptomatic junior cricket fast bowlers confers a very high risk for bone stress injury. The risk may be managed by MRI screening and monitoring bowling frequency.

  • cricket
  • injury prevention
  • stress fracture
  • spondylolysis
  • lumbar spine

Statistics from Altmetric.com

Footnotes

  • Contributors All authors contributed to the publication substantially.

  • Funding Cricket Australia funded the study in its entirety.

  • Competing interests None declared.

  • Patient consent Obtained.

  • Ethics approval La Trobe University.

  • Provenance and peer review Not commissioned; externally peer reviewed.

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.