Article

OBJECTIVES: To examine changes in weight-bearing (WB) asymmetry during sit-stand
transitions for individuals during the first 6 months after unilateral total knee
arthroplasty (TKA). Relationships between WB asymmetry, clinical measures of knee
impairment, and functional mobility also were evaluated. DESIGN: Prospective
repeated-measures design. SETTING: Clinical research laboratory. PARTICIPANTS:
People (N=36) with knee osteoarthritis (OA) scheduled to undergo unilateral TKA
and a control (CTL) group (N=17 healthy people) were enrolled. INTERVENTION: The
TKA group participated in acute, home, and outpatient phases of exercise-based
rehabilitation. MAIN OUTCOME MEASURES: WB asymmetry measured during a 5-Times
Sit-to-Stand Test (FTSST) based on average vertical ground reaction force under
each foot, self-reported knee pain using a numerical pain rating scale, knee
active range of motion symmetry, knee extensor strength symmetry, FTSST time,
6-minute walk test distance, and Stair Climbing Test time. RESULTS: Compared with
preoperative values, the TKA group showed greater WB asymmetry at 1 month after
surgery (P<.001). By 6 months, the TKA group had less WB asymmetry than
preoperative values (P<.001), which was not different from the CTL group.
Symmetry in WB correlated with functional outcomes and symmetry of quadriceps
strength for the TKA group 6 months postoperatively. CONCLUSIONS: Patients with
unilateral knee OA showed WB asymmetry during sit-stand transitions early after
unilateral TKA that improved by 6 months after surgery and was no different from
that for healthy people of similar age. For people in the first 6 months after
TKA, greater symmetry was related to better function and strength symmetry.
CI - Copyright (c) 2011 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS