title: Static balance in patients with patellofemoral pain syndrome.
abstract: BACKGROUND
  The relationship between one-leg static standing balance (OLSSB) and patellofemoral pain syndrome (PFPS) is unknown.
  
  
  OBJECTIVE
  OLSSB decreases in patients with PFPS.
  
  
  METHODS
  Prospective case series.
  
  
  METHODS
  Fifty-two women with unilateral PFPS were enrolled in this study. OLSSB was evaluated with a stabilometer. Q angle was measured with a lengthened-arm universal goniometer. Lower extremity alignment was analyzed with full-length standing anteroposterior teleroentgenograms. Quadriceps and hamstring strength was measured on an isokinetic dynamometer.
  
  
  RESULTS
  There were significant differences in OLSSB, Q angle, and strength of quadriceps and hamstring between the symptomatic and asymptomatic sides. There was a correlation between the strength of the quadriceps and hamstring and OLSSB, while there was no correlation between OLSSB and the severity of pain, lower extremity alignment, and Q angle on the symptomatic side.
  
  
  CONCLUSIONS
  OLSSB and quadriceps and hamstring strength decreased and Q angle increased on the symptomatic side in PFPS patients. A relationship between OLSSB and pain, Q angle, and lower extremity alignment was not detected, while there was a correlation between the strength of the quadriceps and hamstring and OLSSB.
  
  
  CONCLUSIONS
  A quadriceps and hamstring strengthening may be beneficial to improve OLSSB in patients with PFPS.
authors.affiliation: Department of Physical Therapy and Rehabilitation, Gazi University, Ankara, Turkey.
authors.forename: Seyit
authors.initials: S
authors.lastname: Citaker
authors.forename: Defne
authors.initials: D
authors.lastname: Kaya
authors.forename: Inci
authors.initials: I
authors.lastname: Yuksel
authors.forename: Baran
authors.initials: B
authors.lastname: Yosmaoglu
authors.forename: John
authors.initials: J
authors.lastname: Nyland
authors.forename: Ozgur Ahmet
authors.initials: OA
authors.lastname: Atay
authors.forename: Mahmut Nedim
authors.initials: MN
authors.lastname: Doral