Energy recovery in individuals with knee osteoarthritis.
Abstract
OBJECTIVE: Pathological gaits have been shown to limit transfer between potential
(PE) and kinetic (KE) energy during walking, which can increase locomotor costs. The
purpose of this study was to examine whether energy exchange would be limited in people
with knee osteoarthritis (OA). METHODS: Ground reaction forces during walking were
collected from 93 subjects with symptomatic knee OA (self-selected and fast speeds)
and 13 healthy controls (self-selected speed) and used to calculate their center of
mass (COM) movements, PE and KE relationships, and energy recovery during a stride.
Correlations and linear regressions examined the impact of energy fluctuation phase
and amplitude, walking velocity, body mass, self-reported pain, and radiographic severity
on recovery. Paired t-tests were run to compare energy recovery between cohorts. RESULTS:
Symptomatic knee OA subjects displayed lower energetic recovery during self-selected
walking speeds than healthy controls (P = 0.0018). PE and KE phase relationships explained
the majority (66%) of variance in recovery. Recovery had a complex relationship with
velocity and its change across speeds was significantly influenced by the self-selected
walking speed of each subject. Neither radiographic OA scores nor subject self-reported
measures demonstrated any relationship with energy recovery. CONCLUSIONS: Knee OA
reduces effective exchange of PE and KE, potentially increasing the muscular work
required to control movements of the COM. Gait retraining may return subjects to more
normal patterns of energy exchange and allow them to reduce fatigue.
Type
Journal articleSubject
Energy recoveryKnee osteoarthritis
Locomotor costs
Mechanical work
Acceleration
Aged
Anthropometry
Biomechanical Phenomena
Body Mass Index
Case-Control Studies
Disability Evaluation
Energy Metabolism
Female
Gait
Humans
Linear Models
Male
Middle Aged
Mobility Limitation
Osteoarthritis, Knee
Pain Measurement
Prognosis
Reference Values
Severity of Illness Index
Time Factors
Walking
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https://hdl.handle.net/10161/8901Published Version (Please cite this version)
10.1016/j.joca.2014.04.004Publication Info
Sparling, TL; Schmitt, D; Miller, CE; Guilak, F; Somers, TJ; Keefe, FJ; & Queen, RM (2014). Energy recovery in individuals with knee osteoarthritis. Osteoarthritis Cartilage, 22(6). pp. 747-755. 10.1016/j.joca.2014.04.004. Retrieved from https://hdl.handle.net/10161/8901.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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Show full item recordScholars@Duke
Farshid Guilak
Lazlo Ormandy Professor of Orthopaedic Surgery
This author no longer has a Scholars@Duke profile, so the information shown here reflects
their Duke status at the time this item was deposited.
Francis Joseph Keefe
Professor in Psychiatry and Behavioral Sciences
I am Director of the Duke Pain Prevention and Treatment Research Program, an active
NIH funded clinical research program focused on developing new and more effective
ways of assessing and treating patients having acute and persistent pain. I have
been active in nationally and internationally in shaping the pain research agenda.
For the past 10 years I served as Editor in Chief of PAIN the premier journal in pain
research. I also have served as the Chair of a number of NIH Study
Robin Marie Queen
Assistant Professor of Orthopaedic Surgery
This author no longer has a Scholars@Duke profile, so the information shown here reflects
their Duke status at the time this item was deposited.
Daniel Oliver Schmitt
Professor in the Department of Evolutionary Anthropology
My primary interest is in the evolution of primate locomotion. I am studying the
mechanics of movement in primates and other vertebrates in the laboratory to understand
the relationship between movement and postcranial morphology, and the unique nature
of primates among mammals. Current projects include the origins of primate locomotion
and the evolution of vertebrate bipedalism.
Tamara J. Somers
Associate Professor in Psychiatry and Behavioral Sciences
Tamara J. Somers, PhD, is a Clinical Psychologist and Faculty Member in the Department
of Psychiatry and Behavioral Sciences. Dr. Somers conducts research developing, testing,
and implementing behavioral interventions for pain and other symptoms in patients
with chronic disease (e.g., cancer, arthritis). She is particularly interested in
developing behavioral interventions that are personalized to the needs of individual
patients and using innovative delivery methods (mobile health) to delive
Alphabetical list of authors with Scholars@Duke profiles.

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