title: Objective assessment of changes in physical activity and sedentary behavior: Pre- through 3 years post-bariatric surgery.
abstract: OBJECTIVE
  To evaluate change in sedentary behavior (SB) and physical activity (PA) over 3 years following bariatric surgery.
  
  
  METHODS
  A subset of participants in an observational study (n = 473 of 2,458; 79% female, median body mass index 45 kg m(-2) ) wore an activity monitor presurgery and at 1-3 annual postsurgery assessments.
  
  
  RESULTS
  Over the first year, on average, sedentary time decreased from 573 (95% CI: 563-582) to 545 (95% CI: 534-555) min days(-1) and moderate- to vigorous-intensity PA (MVPA) increased from 77 (95% CI: 71-84) to 106 (95% CI: 98-116) min week(-1) , or 7 (95% CI: 5-10) to 24 (95% CI: 18-29) min week(-1) in MVPA bouts ≥10 min. There were no changes in these parameters from years 1 to 3 (P for all > 0.05). The percentage of participants achieving ≥150 min week(-1) of bout-related MVPA was not different at year 3 [6.5% (95% CI: 3.1-12.7)] vs. presurgery [3.4% (95% CI: 1.8-5.0); P = 0.45]. Most participants followed SB and PA trajectories that paralleled mean change and were consistent with their presurgery position in relation to the group.
  
  
  CONCLUSIONS
  On average, bariatric surgical patients make small reductions in SB and increases in PA during the first postsurgery year, which are maintained through 3 years. Still, postsurgery PA levels fall short of PA guidelines for general health or weight control.
authors.affiliation: Department of Epidemiology, University of Pittsburgh, Graduate School of Public Health, Pittsburgh, Pennsylvania, USA.
authors.forename: Wendy C
authors.initials: WC
authors.lastname: King
authors.affiliation: Department of Biostatistics, University of Pittsburgh, Graduate School of Public Health, Pittsburgh, Pennsylvania, USA.
authors.forename: Jia-Yuh
authors.initials: JY
authors.lastname: Chen
authors.affiliation: Department of Psychiatry and Behavioral Medicine, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA.
authors.forename: Dale S
authors.initials: DS
authors.lastname: Bond
authors.affiliation: Department of Epidemiology, University of Pittsburgh, Graduate School of Public Health, Pittsburgh, Pennsylvania, USA.
authors.forename: Steven H
authors.initials: SH
authors.lastname: Belle
authors.affiliation: Department of Minimally Invasive General and Bariatric Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA.
authors.forename: Anita P
authors.initials: AP
authors.lastname: Courcoulas
authors.affiliation: Department of Surgery, Legacy Good Samaritan Weight Management Institute, Portland, Oregon, USA.
authors.forename: Emma J
authors.initials: EJ
authors.lastname: Patterson
authors.affiliation: Neuropsychiatric Research Institute and the Department of Neuroscience, University of North Dakota School of Medicine and Health Sciences, Fargo, North Dakota, USA.
authors.forename: James E
authors.initials: JE
authors.lastname: Mitchell
authors.affiliation: Department of Surgery, Mount Sinai Hospital, New York, New York, USA.
authors.forename: William B
authors.initials: WB
authors.lastname: Inabnet
authors.affiliation: Department of Surgery, Weill Cornell Medical Center, New York, New York, USA.
authors.forename: George F
authors.initials: GF
authors.lastname: Dakin
authors.affiliation: School of Medicine, Department of General Surgery, University of Washington, Seattle, Washington, USA.
authors.forename: David R
authors.initials: DR
authors.lastname: Flum
authors.affiliation: Neuropsychiatric Research Institute and the Department of Neuroscience, University of North Dakota School of Medicine and Health Sciences, Fargo, North Dakota, USA.
authors.forename: Brian
authors.initials: B
authors.lastname: Cook
authors.affiliation: Department of General Surgery, Oregon Health and Science University, Portland, Oregon, USA.
authors.forename: Bruce M
authors.initials: BM
authors.lastname: Wolfe
mesh_terms: D000328:Adult; D050110:Bariatric Surgery; D015992:Body Mass Index; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D011184:Postoperative Period; D057185:Sedentary Behavior; D015430:Weight Gain