Reduced muscle power is associated with slower walking velocity and falls in people with Parkinson's disease

Abstract Purpose Muscle strength (force) and power (force × velocity) are reduced in Parkinson's disease (PD). Reduced muscle power is associated with slower walking velocity and falls in the older population, but these associations in people with PD have not previously been investigated. This...

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Bibliographic Details
Published in:Parkinsonism & related disorders 2010-05, Vol.16 (4), p.261-264
Main Authors: Allen, N.E, Sherrington, C, Canning, C.G, Fung, V.S.C
Format: Article
Language:English
Subjects:
Accidental Falls
Aged
Female
Humans
Male
Middle Aged
Muscle power
Muscle Strength - physiology
Muscle weakness
Neurology
Parkinson Disease - physiopathology
Parkinson's disease
Walking - physiology
Walking velocity
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Summary:Abstract Purpose Muscle strength (force) and power (force × velocity) are reduced in Parkinson's disease (PD). Reduced muscle power is associated with slower walking velocity and falls in the older population, but these associations in people with PD have not previously been investigated. This study investigated the relationships between leg extensor muscle power and strength with walking speed and past falls in people with PD. Participants and Methods Forty people with mild to moderate PD were assessed. Walking velocity was measured over 10 m and the number of falls the participant reported having in the past 12 months was recorded. Leg extensor muscle power and strength were measured using a Keiser leg press machine. Results Muscle power explained more than half of the variance ( R2  = 0.54) in walking velocity and remained significantly ( p  
ISSN:1353-8020
1873-5126
DOI:10.1016/j.parkreldis.2009.12.011