Isokinetic knee extension and flexion strength in individuals with hemiparesis after stroke
(2012) In Isokinetics and Exercise Science 20(2). p.91-97- Abstract
- The aim of this study was to assess knee extensor and flexor muscle torque in individuals with hemiparesis after stroke and determine the relationship with muscle tone. Fifty individuals (mean age 58 +/- 6.4 years), 6 to 48 months after stroke, participated in the study. Maximal concentric knee extension and flexion torque at 60 degrees/s and 120 degrees/s and maximal eccentric knee extension contractions at 60 degrees/s were measured with a Biodex dynamometer. Muscle tone was assessed with the modified Ashworth Scale. The relative weakness in the paretic knee muscles ranged from 30% to 42% and was greater for the flexors and at higher velocities (p < 0.05). The knee flexion/extension torque ratio in the non-paretic lower limb was 0.53... (More)
- The aim of this study was to assess knee extensor and flexor muscle torque in individuals with hemiparesis after stroke and determine the relationship with muscle tone. Fifty individuals (mean age 58 +/- 6.4 years), 6 to 48 months after stroke, participated in the study. Maximal concentric knee extension and flexion torque at 60 degrees/s and 120 degrees/s and maximal eccentric knee extension contractions at 60 degrees/s were measured with a Biodex dynamometer. Muscle tone was assessed with the modified Ashworth Scale. The relative weakness in the paretic knee muscles ranged from 30% to 42% and was greater for the flexors and at higher velocities (p < 0.05). The knee flexion/extension torque ratio in the non-paretic lower limb was 0.53 for both velocities and significantly lower (p < 0.01) for the paretic lower limb (0.44 at 60 degrees/s and 0.39 at 120 degrees/s). The eccentric/concentric ratio in the paretic lower limb (1.66) was significantly higher (p < 0.05) than in the non-paretic lower limb (1.31). Concentric torque in the paretic lower limb was significantly correlated (p < 0.05) with muscle tone. In conclusion, post-stroke weakness of the knee muscles was most prominent in the flexors and at higher velocities, whereas eccentric strength seemed to be preserved. Strength was also associated with the spasticity that can occur after stroke. This post-stroke muscle weakness pattern could be of importance for gait performance and should therefore be accommodated when planning rehabilitation interventions. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2895768
- author
- Flansbjer, Ulla-Britt LU ; Lexell, Jan LU and Brogårdh, Christina LU
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Stroke, muscle strength, muscle strength dynamometers, muscle tonus
- in
- Isokinetics and Exercise Science
- volume
- 20
- issue
- 2
- pages
- 91 - 97
- publisher
- IOS Press
- external identifiers
-
- wos:000305152100004
- scopus:84862996037
- ISSN
- 1878-5913
- DOI
- 10.3233/IES-2012-0446
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Division of Occupational Therapy (Closed 2012) (013025000)
- id
- b1adcd5d-4f0e-4706-b290-6fa39629ac53 (old id 2895768)
- date added to LUP
- 2016-04-01 09:50:31
- date last changed
- 2022-01-25 17:13:03
@article{b1adcd5d-4f0e-4706-b290-6fa39629ac53,
abstract = {{The aim of this study was to assess knee extensor and flexor muscle torque in individuals with hemiparesis after stroke and determine the relationship with muscle tone. Fifty individuals (mean age 58 +/- 6.4 years), 6 to 48 months after stroke, participated in the study. Maximal concentric knee extension and flexion torque at 60 degrees/s and 120 degrees/s and maximal eccentric knee extension contractions at 60 degrees/s were measured with a Biodex dynamometer. Muscle tone was assessed with the modified Ashworth Scale. The relative weakness in the paretic knee muscles ranged from 30% to 42% and was greater for the flexors and at higher velocities (p < 0.05). The knee flexion/extension torque ratio in the non-paretic lower limb was 0.53 for both velocities and significantly lower (p < 0.01) for the paretic lower limb (0.44 at 60 degrees/s and 0.39 at 120 degrees/s). The eccentric/concentric ratio in the paretic lower limb (1.66) was significantly higher (p < 0.05) than in the non-paretic lower limb (1.31). Concentric torque in the paretic lower limb was significantly correlated (p < 0.05) with muscle tone. In conclusion, post-stroke weakness of the knee muscles was most prominent in the flexors and at higher velocities, whereas eccentric strength seemed to be preserved. Strength was also associated with the spasticity that can occur after stroke. This post-stroke muscle weakness pattern could be of importance for gait performance and should therefore be accommodated when planning rehabilitation interventions.}},
author = {{Flansbjer, Ulla-Britt and Lexell, Jan and Brogårdh, Christina}},
issn = {{1878-5913}},
keywords = {{Stroke; muscle strength; muscle strength dynamometers; muscle tonus}},
language = {{eng}},
number = {{2}},
pages = {{91--97}},
publisher = {{IOS Press}},
series = {{Isokinetics and Exercise Science}},
title = {{Isokinetic knee extension and flexion strength in individuals with hemiparesis after stroke}},
url = {{http://dx.doi.org/10.3233/IES-2012-0446}},
doi = {{10.3233/IES-2012-0446}},
volume = {{20}},
year = {{2012}},
}