Relationship between muscle strength and functional walking capacity among people with stroke

J Rehabil Res Dev. 2011;48(3):267-75. doi: 10.1682/jrrd.2010.04.0066.


The purpose of this study was to estimate, using the Position-Specific Global Index (PSGI) of Lower-Limb Muscle Strength, the extent to which muscle strength is independently associated with functional walking capacity. We performed an observational, cross-sectional study with 63 patients poststroke (onset between 3 and 12 months) at a major teaching hospital in an urban Canadian city. We assessed functional walking capacity with the six-minute walk test (6MWT) and muscle strength with handheld dynamometry. We established the relationship between the lower-limb muscles and functional walking capacity with the PSGI. The PSGI explained 70% (p < 0.001) of the variability in the 6MWT, whereas the index of alternate against-gravity muscle strength explained 39% and the hip flexors in a supine position explained 51%.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Comorbidity
  • Cross-Sectional Studies
  • Exercise Test
  • Humans
  • Lower Extremity / physiology
  • Lower Extremity / physiopathology
  • Male
  • Middle Aged
  • Muscle Spasticity / physiopathology
  • Muscle Strength / physiology*
  • Muscle Weakness / etiology
  • Muscle Weakness / physiopathology*
  • Physical Endurance / physiology*
  • Postural Balance / physiology
  • Stroke / complications
  • Stroke / physiopathology*
  • Walking / physiology*