Energy recovery in individuals with knee osteoarthritis.

Sparling, TL

Schmitt, D

Miller, CE

Guilak, F

Somers, TJ

Keefe, FJ

Queen, RM

England

2014-06-20T01:59:57Z

2014-06

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.

http://www.ncbi.nlm.nih.gov/pubmed/24752039

S1063-4584(14)01039-5

1522-9653

https://hdl.handle.net/10161/8901

eng

Elsevier BV

Osteoarthritis Cartilage

10.1016/j.joca.2014.04.004

Energy recovery

Knee 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

Energy recovery in individuals with knee osteoarthritis.

Journal article

Somers, TJ|0000-0002-8809-2979

Keefe, FJ|0000-0003-0583-9326

http://www.ncbi.nlm.nih.gov/pubmed/24752039

747

755

6

Anesthesiology

Biomedical Engineering

Clinical Science Departments

Duke

Duke Cancer Institute

Evolutionary Anthropology

Faculty

Institutes and Centers

Medicine

Medicine, Rheumatology and Immunology

Pratt School of Engineering

Psychiatry & Behavioral Sciences

Psychiatry & Behavioral Sciences, Behavioral Medicine

Psychology and Neuroscience

School of Medicine

Trinity College of Arts & Sciences

Published

22