Yong-Hao Pua, PhD, Ross A. Clark, PhD, Adam L. Bryant, PhD

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Presentation transcript:

Physical Function in Hip Osteoarthritis: Relationship to Isometric Knee Extensor Steadiness Yong-Hao Pua, PhD, Ross A. Clark, PhD, Adam L. Bryant, PhD Archives of Physical Medicine and Rehabilitation Volume 91, Issue 7, Pages 1110-1116 (July 2010) DOI: 10.1016/j.apmr.2010.04.001 Copyright © 2010 American Congress of Rehabilitation Medicine Terms and Conditions

Fig 1 (A) Knee extensor force signals transformed to the time-frequency domain by using wavelet analysis. (B) Time-frequency signals from the 3.9- to 31.2-Hz bandwidth. Archives of Physical Medicine and Rehabilitation 2010 91, 1110-1116DOI: (10.1016/j.apmr.2010.04.001) Copyright © 2010 American Congress of Rehabilitation Medicine Terms and Conditions

Fig 2 (A) Steadiness data that were extracted from the 3.9- to 31.2-Hz bandwidth of the force-time curve. (B) Representative force-time curve from the steadiness trial. Red vertical lines delineate the middle phase of muscle contraction. (C) Morphology of the force-time curve after the steadiness data were extracted. Archives of Physical Medicine and Rehabilitation 2010 91, 1110-1116DOI: (10.1016/j.apmr.2010.04.001) Copyright © 2010 American Congress of Rehabilitation Medicine Terms and Conditions

Fig 3 Interactions between knee extensor steadiness (log transformed) and knee extensor strength for (A) self-paced timed stair test and (B) fast-paced timed stair test. Greater values of knee extensor steadiness indicate greater force fluctuations. High knee extensor strength is defined as 1 SD above the mean knee extensor strength; Low knee extensor strength is defined as 1 SD below the mean knee extensor strength. Abbreviation: B, unstandardized regression coefficient from final hierarchical model. Archives of Physical Medicine and Rehabilitation 2010 91, 1110-1116DOI: (10.1016/j.apmr.2010.04.001) Copyright © 2010 American Congress of Rehabilitation Medicine Terms and Conditions