title: Pattern of muscle injuries and predictors of return-to-play duration among Malaysian athletes.
abstract: BACKGROUND
  The purpose of this study was to investigate the pattern of muscle injuries and the factors that predict the return-to-play duration among Malaysian athletes.
  
  
  METHODS
  This is a retrospective review of the case notes of athletes who attended the National Sports Institute Clinic in Malaysia. The medical records of athletes with muscle injury, diagnosed on clinical assessment and confirmed by diagnostic ultrasonography, were included for final analysis.
  
  
  RESULTS
  From June 2006 to December 2009, 397 cases of muscle injury were diagnosed among 360 athletes. The median age of the athletes with muscle injuries was 20.0 years. Muscle injuries were mostly diagnosed among national-level athletes and frequently involved the lower limb, specifically the hamstring muscle group. Nearly all of the athletes (99.2%) were treated conservatively. The median return-to-play duration was 7.4 weeks. Athletes who waited more than one week before seeking medical attention, those with recurrent muscle injuries and female athletes were significantly more likely (p < 0.05) to take more than six weeks before returning to the sport.
  
  
  CONCLUSIONS
  Grade 2 lower limb muscle injury was commonly diagnosed among national-level athletes in this study. The frequency of weekly physiotherapy sessions did not affect the return-to-play duration. Factors such as initial consultation at more than one week post injury, recurrent muscle injuries and female gender were significant predictors of return-to-play duration among Malaysian athletes. These predictive factors should be kept in mind during clinical assessment so as to aid in prognosticating recovery after muscle injury.
authors.affiliation: Unit of Sports Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia. ayip@um.edu.my.
authors.forename: Hamid A
authors.initials: HA
authors.lastname: Mohamad Shariff
authors.forename: Yusof
authors.initials: Y
authors.lastname: Ashril
authors.forename: Mohamed Ali
authors.initials: MA
authors.lastname: Mohamed Razif
mesh_terms: D056352:Athletes; D001265:Athletic Injuries / Q000175:diagnosis / Q000453:epidemiology / Q000534:rehabilitation; D005500:Follow-Up Studies; D015994:Incidence; D008296:Malaysia / Q000453:epidemiology; D018482:Muscle, Skeletal / Q000000981:diagnostic imaging / Q000293:injuries / Q000503:physiopathology; D026741:Physical Therapy Modalities; D011379:Prognosis; D020127:Recovery of Function; D012189:Retrospective Studies; D013997:Time Factors; D015599:Trauma Severity Indices; D016896:Treatment Outcome; D014463:Ultrasonography; D006801:Humans