title: Changes in the muscle strength and functional performance of healthy women with aging.
abstract: BACKGROUND
  Lower limbs antigravity muscles weakness and decreased functional ability have significant role in falling. The aim of this study was to find the effects of aging on muscle strength and functional ability, determining the range of decreasing strength and functional ability and relationship between them in healthy women.
  
  
  METHODS
  Across-section study was performed on 101 healthy women aged 21-80 years. The participants were divided into six age groups. The maximum isometric strength of four muscle groups was measured using a hand-held dynamometer bilaterally. The functional ability was measured with functional reach (FR), timed get up and go (TGUG), single leg stance (SLS), and stairs walking (SW) tests.
  
  
  RESULTS
  Muscle strength changes were not significant between 21-40 years of age, but decreased significantly thereafter. Also, there was a significant relationship between muscle strength and functional ability in age groups.
  
  
  CONCLUSIONS
  Both muscle strength and functional ability is reduced as a result of aging, but the decrease in functional ability can be detected earlier.
authors.affiliation: PhD., Associate Professor, Department of Physical Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Akbari
authors.forename: Roghayeh
authors.initials: R
authors.lastname: Mousavikhatir
keywords: Aging; Dynamometer; Functional performance; Muscle strength