title: Isokinetic dynamometry of knee flexors and extensors: comparative study among non-athletes, jumper athletes and runner athletes.
abstract: Participation in intensive sports activities leads to muscular specializations that may generate alterations in involved articular forces and cause static (posture) and dynamic changes (alterations of articular stability, coordination, etc.). Prevention of injury requires specific functional muscular evaluation in all athletes and for any kind of sport.
  
  
  OBJECTIVE
  To dynamically evaluate, through isokinetic tests, the peak torque, total work, and average power of the knee flexor and extensor muscles of jumper and runner athletes and compare them to those of a non-athletic population, evaluating dominance and balance between agonistic and antagonistic muscle groups.
  
  
  RESULTS
  In the non-athlete group, we noted a higher asymmetry between the dominant and nondominant members. The jumpers had the highest values of the evaluated parameters of all groups, whereas parameters for the runners were intermediate between non-athletes and jumpers.
authors.affiliation: Department of Orthopedics and Traumatology, Hospital das Clínicas, Faculty of Medicine, University of São Paulo.
authors.forename: Cássio Marinho
authors.initials: CM
authors.lastname: Siqueira
authors.forename: Fábio Ribeiro Mendes Mota
authors.initials: FR
authors.lastname: Pelegrini
authors.forename: Maurício Furginelli
authors.initials: MF
authors.lastname: Fontana
authors.forename: Julia Maria D
authors.initials: JM
authors.lastname: Greve
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D001265:Athletic Injuries / Q000517:prevention & control; D001696:Biomechanical Phenomena; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D008297:Male; D009119:Muscle Contraction / Q000502:physiology; D018482:Muscle, Skeletal / Q000502:physiology*; D012420:Running / Q000502:physiology*; D019415:Torque; D014142:Track and Field / Q000502:physiology*