Energy recovery in individuals with knee osteoarthritis.
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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.
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Published Version (Please cite this version)10.1016/j.joca.2014.04.004
Publication InfoGuilak, Farshid; Keefe, Francis Joseph; Miller, CE; Queen, RM; Schmitt, Daniel Oliver; Somers, TJ; & Sparling, TL (2014). Energy recovery in individuals with knee osteoarthritis. Osteoarthritis Cartilage, 22(6). pp. 747-755. 10.1016/j.joca.2014.04.004. Retrieved from http://hdl.handle.net/10161/8901.
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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.
Professor in Psychiatry and Behavioral Sciences
The primary aim of our research over the past year has been to evaluate the efficacy of cognitive-behavioral treatments for arthritis pain. We are conducting two treatment outcome studies supported by grants from the National Institute of Arthritis, Musculoskeletal, and Skin Diseases. The first project, conducted with osteoarthritis patients, seeks to determine whether aerobic exercise training can enhance the effects of a cognitive behavior therapy (CBT) intervention for managing pain an
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.
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