Article

Factors predicting weight-bearing asymmetry (WBA) after unilateral total knee
arthroplasty (TKA) are not known. However, identifying modifiable and
non-modifiable predictors of WBA is needed to optimize rehabilitation, especially
since WBA is negatively correlated to poor functional performance. The purpose of
this study was to identify factors predictive of WBA during sit-stand transitions
for people 1month following unilateral TKA. METHODS:
Fifty-nine people were
tested preoperatively and 1month following unilateral TKA for WBA using average
vertical ground reaction force under each foot during the Five Times Sit-to-Stand
Test. Candidate variables tested in the regression analysis represented physical
impairments (strength, muscle activation, pain, and motion), demographics,
anthropometrics, and movement compensations. RESULTS: WBA, measured as the ratio
of surgical/non-surgical limb vertical ground reaction force, was 0.69 (0.18)
(mean (SD)) 1month after TKA. Regression analysis identified preoperative WBA
(beta=0.40), quadriceps strength ratio (beta=0.31), and hamstrings strength ratio
(beta=0.19) as factors predictive of WBA 1month after TKA (R(2)=0.30).
CONCLUSION: Greater amounts of WBA 1month after TKA are predicted by modifiable
factors including habitual movement pattern and asymmetry in quadriceps and
hamstrings strength.
CI - Copyright (c) 2012 Elsevier B.V. All rights reserved.

Langue : ANGLAIS