Peak knee flexion angles during stair descent in TKA patients.
Reduced peak knee flexion during stair descent (PKSD) is demonstrated in subjects with total knee arthroplasty (TKA), but the underlying factors are not well studied. 3D gait patterns during stair descent, peak passive knee flexion (PPKF), quadriceps strength, pain, proprioception, demographics, and anthropometrics were assessed in 23 unilateral TKA-subjects ~19 months post-operatively, and in 23 controls. PKSD, PPKF and quadriceps strength were reduced in the TKA-side, but also in the contralateral side. A multiple regression analysis identified PPKF as the only predictor (57%) to explain the relationship with PKSD. PPKF was, however sufficient for normal PKSD. Deficits in quadriceps strength in TKA-group suggest that strength is also contributing to smaller PKSD. Increased hip adduction at PKSD may indicate both compensatory strategy and reduced hip strength.
Department of Community Medicine & Rehabilitation, Physiotherapy Umeå University, Umeå, Sweden; Department of Physiotherapy, School of Health Education & Social Work, Sør-Trøndelag University College, Trondheim, Norway.
Joakim
J
Bjerke
Department of Biomedical Engineering & Informatics, Umeå University Hospital, Umeå, Sweden.
Fredrik
F
Öhberg
Surgical & Perioperative Sciences, Umeå University Hospital, Umeå, Sweden.
Kjell G
KG
Nilsson
Orthopaedic Research Centre, Trondheim University Hospital, Trondheim, Norway.
Olav A
OA
Foss
Department of Community Medicine & Rehabilitation, Physiotherapy Umeå University, Umeå, Sweden; Department of Physiotherapy, School of Health Education & Social Work, Sør-Trøndelag University College, Trondheim, Norway.
Ann K
AK
Stensdotter
D019645:Arthroplasty, Replacement, Knee; D001696:Biomechanical Phenomena; D003430:Cross-Sectional Studies; D005260:Female; D005684:Gait / Q000502:physiology; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery; D016059:Range of Motion, Articular
gait analysis; kinematics; range of motion; total knee arthroplasty