title: A pilot study to investigate explosive leg extensor power and walking performance after stroke.
abstract: We examined explosive leg extensor power (LEP) and gait in men and women after a stroke using an experimental observational design. A convenience sample of consecutively referred individuals (8 men, 6 women) with chronic stroke mean age ± SD, range, 46.4 ± 8.4, 32 - 57 years, and able to walk for four minutes were recruited. The test re-test reliability and performance of LEP was measured together with walking parameters. LEP (Watts·kg(-1)) and gait measures during a four-minute walk; temporal-spatial gait parameters (GAITRite(®)) and oxygen cost of walking (mL·kg(-1)·m(-1)) were recorded. Percentage Asymmetry LEP (stronger LEP - weaker LEP/stronger LEP x 100) was calculated for each person. LEP was reliable from test to re-test ICC [3, 1] 0.8 - 0.7 (n = 9). Greater Asymmetry LEP correlated strongly with reduced walking velocity, cadence, stance time, and swing time on the weaker leg (n = 14) (p < 0.01). Findings demonstrate explosive LEP, in particular Percentage Asymmetry LEP, can be measured after stroke and is both reliable and related to walking performance. LEP training of the stronger or weaker leg warrants further investigation in this group. Key PointsExplosive leg power (LEP) is a reliable measure in individuals recovering from a stroke.Significant asymmetry occurred in LEP in this group.Greater LEP asymmetry related to reduced walking performance after stroke.
authors: Department of Clinical Neurology, University of Oxford , UK ; School of Biological and Molecular Sciences, Oxford Brookes University , UK.
authors: Helen
authors: H
authors: Dawes
authors: School of Healthcare, Oxford Brookes University , UK.
authors: Catherine
authors: C
authors: Smith
authors: School of Biological and Molecular Sciences, Oxford Brookes University , UK.
authors: Johnny
authors: J
authors: Collett
authors: Oxford Centre for Enablement , Oxford, UK.
authors: Derick
authors: D
authors: Wade
authors: School of Biological and Molecular Sciences, Oxford Brookes University , UK.
authors: Ken
authors: K
authors: Howells
authors: School of Biological and Molecular Sciences, Oxford Brookes University , UK.
authors: Roger
authors: R
authors: Ramsbottom
authors: School of Technology, Department of Mathematical Sciences, Oxford Brookes University , UK.
authors: Hooshang
authors: H
authors: Izadi
authors: School of Health Sciences, University of Birmingham , UK.
authors: Cath
authors: C
authors: Sackley
keywords: Stroke; asymmetry; leg extensor power; walking