title: Effect of physical activity guidelines on physical function in older adults.
abstract: OBJECTIVE
  To determine whether elderly people who meet national guidelines have higher physical function (PF) scores than those who do not and the effect on functional trajectory when physical activity (PA) levels change from above to below this threshold, or vice versa.
  
  
  METHODS
  Pooled data.
  
  
  METHODS
  Two 6-month randomized controlled trials aimed at increasing PA in adults.
  
  
  METHODS
  Adults aged 65 to 94 (N=357).
  
  
  METHODS
  PA counseling over the telephone and through mailed materials.
  
  
  METHODS
  Self-reported PA dichotomized at 150 minutes/week and PF using the Medical Outcomes Study 36-item Short Form Questionnaire PF subscale.
  
  
  RESULTS
  At baseline, individuals reporting 150 minutes or more of moderate PA/week had mean PF scores that were 20.3 points higher than those who did not (P<.001). Change in PA minutes from above threshold to below threshold or from below threshold to above threshold from baseline to 6 months resulted in an average change in PF of -11.18 (P<.001) and +5.10 (P=.05), respectively.
  
  
  CONCLUSIONS
  These findings suggest that PA is an important predictor of functional status. Older sedentary adults can improve PF by meeting recommended PA levels. Conversely, dropping below recommended PA levels has a deleterious effect on PF. Given the importance of PF in maintenance of independence and quality of life in older adults, adherence to recommended PA guidelines should be endorsed.
authors.affiliation: Durham Veterans Affairs Medical Center/Geriatric Research, Durham, North Carolina 27705, USA. morey@geri.duke.edu
authors.forename: Miriam C
authors.initials: MC
authors.lastname: Morey
authors.forename: Richard
authors.initials: R
authors.lastname: Sloane
authors.forename: Carl F
authors.initials: CF
authors.lastname: Pieper
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Peterson
authors.forename: Megan P
authors.initials: MP
authors.lastname: Pearson
authors.forename: Carola C
authors.initials: CC
authors.lastname: Ekelund
authors.forename: Gail M
authors.initials: GM
authors.lastname: Crowley
authors.forename: Wendy
authors.initials: W
authors.lastname: Demark-Wahnefried
authors.forename: Denise C
authors.initials: DC
authors.lastname: Snyder
authors.forename: Elizabeth C
authors.initials: EC
authors.lastname: Clipp
authors.forename: Harvey J
authors.initials: HJ
authors.lastname: Cohen
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D015992:Body Mass Index; D003376:Counseling; D005260:Female; D006293:Health Promotion; D006801:Humans; D008297:Male; D009043:Motor Activity; D010353:Patient Education as Topic; D013689:Telephone
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