title: Dynamics of muscle strength improvement during isokinetic rehabilitation of athletes with ACL rupture and chondromalacia patellae.
abstract: OBJECTIVE
  To assess quantitatively dynamics and extent of the increase in muscle strength during isokinetic rehabilitation.
  
  
  METHODS
  
  
  
  METHODS
  daily measurements of muscle strength; detailed testing at the beginning and at the end of rehabilitation.
  
  
  METHODS
  Cybex Rehabilitation Center, Zagreb.
  
  
  METHODS
  44 athletes (31 m, 13 F, age 16-35), 3 injury-defined groups: athletes with ACL rupture (non-reconstructed and reconstructed) and chondromalacia patellae.
  
  
  METHODS
  all subjects underwent isokinetic rehabilitation on Cybex Orthotron KT2 device, using individually designed protocols (extension and flexion exercises, concentric muscle contractions, 15 treatments).
  
  
  METHODS
  monitoring of daily progress on rehabilitation device and detailed testing on diagnostic device.
  
  
  RESULTS
  All patients showed considerable improvement. Muscle strength improved on average 141% (SD=110) in ACL-reconstructed group, 144% (SD=130) for chondromalacia patellae group and 150% (SD=74) for ACL-non-reconstructed group, comparing to initial strength. Dynamic status tested on Cybex Otrhotron diagnostic device prior and after rehabilitation strongly correlated with final progress monitored on the rehabilitation device.
  
  
  CONCLUSIONS
  Isokinetic rehabilitation is a quick and effective method in treating knee injuries in athletes. Both types of objective criteria have shown significant increase in muscle strength. The improvement of muscle strength was on the average 149% (SD=101), which is about 10% daily for 15 treatments. The greatest progress, 19% per day, occurred during first five days. The athletes were able to resume their sport activities as follows: patients from chondromalacia patellae group, and most of them from the non-reconstructed ACL group were back in competition within a month, while 75% from the ACL reconstructed group came back within 3 months, and the rest of them within 5 months.
authors.affiliation: Cybex Rehabilitation Center, Zagreb, Croatia.
authors.forename: N
authors.initials: N
authors.lastname: Desnica Bakrac
mesh_terms: D000293:Adolescent; D000328:Adult; D000070598:Anterior Cruciate Ligament Injuries; D001265:Athletic Injuries / Q000534:rehabilitation; D002358:Cartilage, Articular / Q000503:physiopathology; D005260:Female; D006801:Humans; D007718:Knee Injuries / Q000534:rehabilitation*; D008297:Male; D018482:Muscle, Skeletal / Q000503:physiopathology*; D010018:Osteomalacia / Q000534:rehabilitation*; D010329:Patella; D026741:Physical Therapy Modalities / Q000379:methods*; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012421:Rupture / Q000534:rehabilitation; D019415:Torque; D016896:Treatment Outcome