Quadriceps strength asymmetry predicts loading asymmetry during sit-to-stand task in patients with unilateral total knee arthroplasty

Purpose This study aimed to examine interlimb differences in muscle strength and sit-to-stand (STS) kinetics in persons who underwent unilateral total knee arthroplasty (TKA) and to determine whether knee pain, quadriceps or hip abductor weakness contributes to altered STS performance. It was hypoth...

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Bibliographic Details
Published in:Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA sports traumatology, arthroscopy : official journal of the ESSKA, 2016-08, Vol.24 (8), p.2587-2594
Main Authors: Alnahdi, Ali H., Zeni, Joseph A., Snyder-Mackler, Lynn
Format: Article
Language:English
Subjects:
Activities of Daily Living
Aged
Arthroplasty, Replacement, Knee
Asymmetry
Biomechanical Phenomena
Body mass index
Cross-Sectional Studies
Female
Humans
Joint replacement surgery
Knee
Knee Joint - surgery
Male
Medicine
Medicine & Public Health
Middle Aged
Muscle Strength
Muscle Weakness - physiopathology
Orthopedics
Pain
Patients
Physical therapy
Postoperative Period
Posture
Quadriceps Muscle - physiopathology
Symmetry
Weight-Bearing
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Summary:Purpose This study aimed to examine interlimb differences in muscle strength and sit-to-stand (STS) kinetics in persons who underwent unilateral total knee arthroplasty (TKA) and to determine whether knee pain, quadriceps or hip abductor weakness contributes to altered STS performance. It was hypothesized that the operated limb would have weaker muscles, lower mechanical loading and that operated knee pain and muscle strength symmetry would predict loading symmetry between limbs during STS. Methods One hundred and forty-two patients, 6 or 12 months post-unilateral TKA, underwent 3D motion analysis (VICON) of the STS task and isometric strength testing of the quadriceps and hip abductors. Knee pain was also quantified using a question from the Knee Outcome Survey-Activities of Daily Living Scale. Results The operated limb had weaker quadriceps ( P  
ISSN:0942-2056
1433-7347
DOI:10.1007/s00167-015-3827-x