Sagittal plane walking biomechanics in individuals with knee osteoarthritis after quadriceps strengthening.

Autor: Davis HC; University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. Electronic address: davishc@live.unc.edu., Luc-Harkey BA; Brigham and Women's Hospital, Boston, MA, USA. Electronic address: bharkey@bwh.harvard.edu., Seeley MK; Brigham Young University, Provo, UT, USA. Electronic address: matthewkseeley@gmail.com., Troy Blackburn J; University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. Electronic address: troyb@email.unc.edu., Pietrosimone B; University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. Electronic address: brian@unc.edu.
Jazyk: angličtina
Zdroj: Osteoarthritis and cartilage [Osteoarthritis Cartilage] 2019 May; Vol. 27 (5), pp. 771-780. Date of Electronic Publication: 2019 Jan 18.
DOI: 10.1016/j.joca.2018.12.026
Abstrakt: Objective: To compare sagittal walking gait biomechanics between participants with knee osteoarthritis (KOA) who increased quadriceps strength following a lower-extremity strengthening intervention (responders) and those who did not increase strength following the same strengthening protocol (non-responders) both at baseline and following the lower extremity strengthening protocol.
Design: Fifty-three participants with radiographic KOA (47% female, 62.3 ± 7.1 years, BMI = 28.5 ± 3.9 kg/m 2 ) were enrolled in 10 sessions of lower extremity strengthening over a 28-day period. Maximum isometric quadriceps strength and walking gait biomechanics were collected on the involved limb at baseline and 4-weeks following the strengthening intervention. Responders were classified as individuals who increased quadriceps strength greater than the upper limit of the 95% confidence interval (CI) for the minimal detectable change (MDC) in quadriceps strength (29 Nm) determined in a previous study. 2 × 2 functional analyses of variance were used to evaluate the effects of group (responders and non-responders) and time (baseline and 4-weeks) on time-normalized waveforms for knee flexion angle (KFA), vertical ground reaction force (vGRF), and internal knee extension moment (KEM).
Results: A significant group x time interaction for KFA demonstrated greater KFA in the first half of stance at baseline and greater knee extension in the second half of stance at 4-weeks in responders compared to non-responders. There was no significant group x time interaction for vGRF or internal KEM.
Conclusions: Quadriceps strengthening may be used to stimulate small changes in KFA in individuals with KOA.
(Copyright © 2019 Osteoarthritis Research Society International. Published by Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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