title: Reducing Sedentary Behavior Versus Increasing Moderate-to-Vigorous Intensity Physical Activity in Older Adults.
abstract: OBJECTIVE
  To compare the effects of behavioral interventions targeting decreased sedentary behavior versus increased moderate-to-vigorous intensity physical activity (MVPA) in older adults.
  
  
  METHODS
  Inactive older adults ( N = 38, 68 ± 7 years old, 71% female) were randomized to 12-week interventions targeting decreased sedentary behavior ( Sit Less) or increased MVPA ( Get Active). The SenseWear armband was used to objectively assess activity in real time. Assessments included a blinded armband, the Community Health Activites Model Program for Senior (CHAMPS) questionnaire, 400-meter walk, and the Short Physical Performance Battery (SPPB).
  
  
  RESULTS
  Objectively measured MVPA increased in Get Active (75 ± 22 min/week, p < .001); self-reported MVPA increased in both groups ( p < .05). Sedentary behavior did not change in either group (all p > .05). Only the Sit Less group improved the SPPB score (0.5 ± 0.3, p = .046).
  
  
  CONCLUSIONS
  Targeting reduced sedentary behavior had a greater effect on physical function among inactive but high functioning older adults over 12 weeks. Future studies of longer duration and combining increased MVPA with reduced sedentary behavior are needed.
authors.affiliation: 1 University of Pittsburgh, PA, USA.
authors.forename: Bethany
authors.initials: B
authors.lastname: Barone Gibbs
authors.affiliation: 1 University of Pittsburgh, PA, USA.
authors.forename: Jennifer S
authors.initials: JS
authors.lastname: Brach
authors.affiliation: 1 University of Pittsburgh, PA, USA.
authors.forename: Tom
authors.initials: T
authors.lastname: Byard
authors.affiliation: 1 University of Pittsburgh, PA, USA.
authors.forename: Seth
authors.initials: S
authors.lastname: Creasy
authors.affiliation: 1 University of Pittsburgh, PA, USA.
authors.forename: Kelliann K
authors.initials: KK
authors.lastname: Davis
authors.affiliation: 1 University of Pittsburgh, PA, USA.
authors.forename: Stephanie
authors.initials: S
authors.lastname: McCoy
authors.affiliation: 1 University of Pittsburgh, PA, USA.
authors.forename: Anna
authors.initials: A
authors.lastname: Peluso
authors.affiliation: 1 University of Pittsburgh, PA, USA.
authors.forename: Renee J
authors.initials: RJ
authors.lastname: Rogers
authors.affiliation: 1 University of Pittsburgh, PA, USA.
authors.forename: Kristie
authors.initials: K
authors.lastname: Rupp
authors.affiliation: 1 University of Pittsburgh, PA, USA.
authors.forename: John M
authors.initials: JM
authors.lastname: Jakicic
mesh_terms: D000368:Aged; D015444:Exercise; D005260:Female; D015438:Health Behavior; D006293:Health Promotion; D006801:Humans; D008297:Male; D008875:Middle Aged; D057185:Sedentary Behavior; D057566:Self Report; D011795:Surveys and Questionnaires
keywords: older adults; physical activity; physical function; sedentary time