scholarly journals Associations of knee extensor strength and standing balance with physical function in knee osteoarthritis

2011 ◽  
Vol 63 (12) ◽  
pp. 1706-1714 ◽  
Author(s):  
Yong-Hao Pua ◽  
Zhiqi Liang ◽  
Peck-Hoon Ong ◽  
Adam L. Bryant ◽  
Ngai-Nung Lo ◽  
...  
Keyword(s):  
Knee Osteoarthritis ◽  
Physical Function ◽  
Knee Extensor ◽  
Standing Balance ◽  
Knee Extensor Strength

scholarly journals Should We Use Unilateral or Bilateral Tasks to Assess Maximal and Explosive Knee Extensor Strength in Patients with Knee Osteoarthritis? A Cross-Sectional Study

2021 ◽  
Vol 10 (19) ◽  
pp. 4353
Author(s):  
Jonas Pfeifle ◽  
David Hasler ◽  
Nicola Maffiuletti
Keyword(s):  
Knee Osteoarthritis ◽  
Clinical Relevance ◽  
Knee Extensor ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Strength Performance ◽  
Explosive Strength ◽  
Knee Extensor Strength ◽  
And Performance ◽  
Voluntary Contractions

Deficits in maximal and explosive knee extensor strength, which are usually assessed with unilateral tasks, are substantial in patients with knee osteoarthritis (KOA). The aim of this study was to investigate the clinical relevance of unilateral vs. bilateral tasks for assessing knee extensor strength in patients with KOA. This was achieved primarily by comparing unilateral and bilateral inter-limb strength asymmetries and secondarily by examining the relationship between unilaterally and bilaterally measured strength, and performance-based and self-reported function. Twenty-four patients with unilateral KOA (mean age: 65 ± 7 years) performed isometric gradual and explosive maximal voluntary contractions to assess, respectively their maximal and explosive strength. Performance-based and self-reported function were also evaluated with standard functional tests and questionnaires, respectively. Inter-limb asymmetries of maximal and explosive strength did not differ significantly between unilateral (mean asymmetry: 26 ± 15%) and bilateral tasks (22 ± 21%). In the same way, the relationships between knee extensor strength—measured either unilaterally or bilaterally—and performance-based or self-reported function were not influenced by the type of task. In conclusion, it does not seem to make a difference in terms of clinical relevance whether maximal and explosive knee extensor strength are evaluated with unilateral or bilateral tasks in KOA patients.

scholarly journals Olfaction and Physical Function in Older Adults: Findings From Health ABC

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 530-531
Author(s):  
Yaqun Yuan ◽  
Zhehui Luo ◽  
Chenxi Li ◽  
Eleanor Simonsick ◽  
Eric Shiroma ◽  
...  
Keyword(s):  
Older Adults ◽  
Physical Function ◽  
Physical Performance ◽  
Physical Functioning ◽  
Knee Extensor ◽  
Community Dwelling ◽  
Potential Health ◽  
Knee Extensor Strength ◽  
Race Disparities

Abstract The present study aims to investigate poor olfaction in relation to physical functioning in community-dwelling older adults and potential sex and race disparities. The analysis included 2511 participants aged 71-82 years (51.7% women and 38.4% blacks) from the Health Aging, and Body Composition (Health ABC) study. Olfaction was tested with the 12-item Brief Smell Identification Test (BSIT). Physical function measures included the Short Physical Performance Battery (SPPB), the Health ABC Physical Performance Battery (HABCPPB), gait speed of 20-meter walk, fast 400-meter walking time, grip strength, and knee extensor strength, repeatedly assessed annually or biennially for a follow-up of seven years. We analyzed each of these physical function measures using mixed models, adjusting for demographics, lifestyle, and comorbidities. For all measures except grip and knee extensor strength, poor olfaction was clearly associated with poorer physical performance at baseline and a faster decline over time. For example, at baseline, the multivariate adjusted SPPB was 8.23 ± 0.09 for participants with poor olfaction and 8.55 ± 0.09 for those with good olfaction (P = 0.02), after seven years of follow-up, the corresponding scores decreased to 6.46 ± 0.12 and 7.36 ± 0.10 respectively (cross-sectional P<0.001, and P for olfaction-by-year interaction < 0.001). For grip and knee extensor strength, similar differences were suggested but didn’t reach statistical significance. The overall results were similar by sex and race. In summary, poor olfaction is clearly associated with faster decline in physical functioning in older adults and future studies should investigate its potential health implications.

scholarly journals Knee Extensor Strength Does Not Protect Against Incident Knee Symptoms at 30 Months in the Multicenter Knee Osteoarthritis (MOST) Cohort

PM&R ◽  
2009 ◽  
Vol 1 (5) ◽  
pp. 459-465 ◽  
Author(s):  
Neil A. Segal ◽  
James C. Torner ◽  
David T. Felson ◽  
Jingbo Niu ◽  
Leena Sharma ◽  
...  
Keyword(s):  
Knee Osteoarthritis ◽  
Knee Extensor ◽  
Knee Extensor Strength

scholarly journals Knee Extensor Power Relates to Mobility Performance in People With Knee Osteoarthritis: Cross-Sectional Analysis

2015 ◽  
Vol 95 (7) ◽  
pp. 989-995 ◽  
Author(s):  
Angela J. Accettura ◽  
Elora C. Brenneman ◽  
Paul W. Stratford ◽  
Monica R. Maly
Keyword(s):  
Knee Osteoarthritis ◽  
Muscle Power ◽  
Knee Extensor ◽  
Predictive Ability ◽  
Cross Sectional ◽  
Knee Oa ◽  
Stair Ascent ◽  
Stair Descent ◽  
Knee Extensor Strength ◽  
Peak Knee

BackgroundQuadriceps femoris muscle strengthening is a common rehabilitation exercise for knee osteoarthritis (OA). More information is needed to determine whether targeting muscle power is a useful adjunct to strengthening for people with knee OA.ObjectiveThe purpose of this study was to identify the predictive ability of knee extensor strength and knee extensor power in the performance of physical tasks in adults with knee OA.DesignThis study used a cross-sectional design.MethodsFifty-five participants with clinical knee OA were included (43 women; mean [SD] age=60.9 [6.9] years). Dependent variables were: timed stair ascent, timed stair descent, and the Six-Minute Walk Test (6MWT). Independent variables were: peak knee extensor strength and mean peak knee extensor power. Covariates were: age, body mass index, and self-efficacy. Multiple regression analyses were run for each dependent variable with just covariates, then a second model including strength, and then a third model including power. The R2 values were compared between models.ResultsPower explained greater variance than strength in all models. Over and above the covariates, power explained an additional 6% of the variance in the 6MWT, increasing the R2 value from .33 to .39; 8% in the stair ascent test, increasing the R2 value from .52 to .60; and 3% in the stair descent test, increasing the R2 value from .44 to .47.LimitationsThe sample demonstrated very good mobility and muscle function scores and may not be indicative of those with severe knee OA.ConclusionsIn adults with knee OA, knee extensor power was a stronger determinant of walking and stair performance when compared with knee extensor strength. Clinicians should consider these results when advising patients on exercise to maintain or improve mobility.

Knee extensor strength and body weight in adolescent men and the risk of knee osteoarthritis by middle age

2017 ◽  
Vol 76 (10) ◽  
pp. 1657-1661 ◽  
Author(s):  
Aleksandra Turkiewicz ◽  
Simon Timpka ◽  
Jonas Bloch Thorlund ◽  
Eva Ageberg ◽  
Martin Englund
Keyword(s):  
Body Weight ◽  
Knee Osteoarthritis ◽  
Middle Age ◽  
Knee Extensor ◽  
Knee Extensor Strength
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