title: Total daily activity is associated with cognition in older persons.
abstract: OBJECTIVE
  The authors tested the hypothesis that total daily physical activity is related to the level of cognition in older persons.
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  Retirement communities across the Chicago metropolitan area.
  
  
  METHODS
  Five hundred twenty-one older persons without dementia.
  
  
  METHODS
  Participants underwent structured evaluation of cognition and objective measures of total daily physical activity were collected using actigraphy.
  
  
  RESULTS
  In a linear regression model adjusted for age, sex, and education, total daily activity was associated with a global measure of cognition. By contrast, self-report physical activity was not associated with cognition. Further analyses showed that total daily activity was related to all five cognitive subscales.
  
  
  CONCLUSIONS
  Objective measures of total daily physical activity were associated with a broad range of cognitive abilities in older persons. These findings support the link between physical activity and cognition in the elderly.
authors.affiliation: Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL 60612, USA. aron_s_buchman@rush.edu
authors.forename: Aron S
authors.initials: AS
authors.lastname: Buchman
authors.forename: Robert S
authors.initials: RS
authors.lastname: Wilson
authors.forename: David A
authors.initials: DA
authors.lastname: Bennett
mesh_terms: D000203:Activities of Daily Living; D000368:Aged / Q000523:psychology*; D000369:Aged, 80 and over / Q000523:psychology; D002641:Chicago; D003071:Cognition; D003430:Cross-Sectional Studies; D016552:Ergometry; D015444:Exercise; D005260:Female; D006801:Humans; D008297:Male; D012044:Regression Analysis