1. Association of Dynamic Joint Power With Functional Limitations in Older Adults With Symptomatic Knee Osteoarthritis 
Neil A. Segal, MD, MS, H. John Yack, PT, PhD, Morgan Brubaker, BA, James C. Torner, PhD, Robert Wallace, MS, MD 
Archives of Physical Medicine and Rehabilitation 
Volume 90, Issue 11, Pages (November 2009)
DOI: /j.apmr
Copyright © 2009 American Congress of Rehabilitation Medicine Terms and Conditions

2. Fig 1 Phases and key events of gait by percent of gait cycle.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2009 American Congress of Rehabilitation Medicine Terms and Conditions

3. Fig 2
Example gait data for women. (A) High-functioning person with greater negative power at the knee during preswing and initial swing and less negative power at the end of swing phase. (B) Low-functioning person generating less positive power during midstance (typically associated with moving the pelvis towards a more neutral position).
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2009 American Congress of Rehabilitation Medicine Terms and Conditions

4. Fig 3
Example gait data for men; same persons in both plates. (A) Low-functioning person demonstrating more of a hip strategy in which greater positive power is generated at the hip to compensate for decreased power generation at the ankle (B).
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )
Copyright © 2009 American Congress of Rehabilitation Medicine Terms and Conditions