Time course of quad strength, area, and activation after knee arthroplasty and strength training.

ABSTRACT:

Introduction

changes in strength, activation, and morphology of the quadriceps femoris muscle group were assessed in 61 individuals that underwent unilateral total knee arthroplasty, with progressive postoperative strength training, for primary knee osteoarthritis.

Methods

assessments of these three parameters were made at four time points (preoperatively and 4, 12, and 52 wk postoperatively). Maximal voluntary knee extension strength was recorded using an electromechanical dynamometer, and voluntary muscle activation was measured using a burst superimposition technique. Lean muscle cross-sectional area (CSA) was determined using magnetic resonance imaging.

Results

preoperatively, the surgical limb was significantly weaker and smaller than the nonsurgical limb. Streng

SUBMITTER: Petterson SC 

PROVIDER: S-EPMC3573844 | biostudies-literature | 2011 Feb

REPOSITORIES: biostudies-literature