title: Physical fitness, physical activity, and functional limitation in adults aged 40 and older.
abstract: OBJECTIVE
  A cohort of middle-aged and older men and women were followed for an average of 5.5 yr to examine the association between physical fitness, physical activity, and the prevalence of functional limitation.
  
  
  METHODS
  The participants received medical assessments between 1980 and 1988 and responded to a mail-back survey regarding functional status in 1990.
  
  
  RESULTS
  Among 3495 men and 1175 women over 40 yr of age at baseline, 350 (7.5%) reported at least one functional limitation in daily or household activities at follow-up. The prevalence of functional limitation was higher among women than men. Physically fit and physically active participants reported less functional limitation than unfit or sedentary participants. After controlling for age and other risk factors, the prevalence of functional limitation was lower for both moderately fit (odds ratio = 0.4, 95% CI = 0.2-0.6) and high fit men (odds ratio = 0.3, 95% CI = 0.2-0.4), compared with low fit men. Corresponding figures for women were 0.5 (0.3-0.7) and 0.3 (0.2-0.5) for moderately fit and high fit women. The association between physical activity and functional limitation was similar to the data for physical fitness.
  
  
  CONCLUSIONS
  These data support a protective effect of physical fitness and physical activity on functional limitation among older adults and extend this protective effect to middle-aged men and women.
authors.affiliation: Prevention Center, School of Public Health, University of South Carolina, Columbia 29208, USA. yhuang@sph.sc.edu
authors.forename: Y
authors.initials: Y
authors.lastname: Huang
authors.forename: C A
authors.initials: CA
authors.lastname: Macera
authors.forename: S N
authors.initials: SN
authors.lastname: Blair
authors.forename: P A
authors.initials: PA
authors.lastname: Brill
authors.forename: H W
authors.initials: HW
authors.lastname: Kohl
authors.forename: J J
authors.initials: JJ
authors.lastname: Kronenfeld
mesh_terms: D000328:Adult; D000367:Age Factors; D015331:Cohort Studies; D006233:Persons with Disabilities / Q000706:statistics & numerical data; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010809:Physical Fitness / Q000502:physiology*; D015995:Prevalence; D013781:Texas / Q000453:epidemiology