Obesity Surgery

, Volume 24, Issue 7, pp 1064–1072

Keeping the Weight Off: Physical Activity, Sitting Time, and Weight Loss Maintenance in Bariatric Surgery Patients 2 to 16 Years Postsurgery

  • Katya M. Herman
  • Tamara E. Carver
  • Nicolas V. Christou
  • Ross E. Andersen
Original Contributions

DOI: 10.1007/s11695-014-1212-3

Cite this article as:
Herman, K.M., Carver, T.E., Christou, N.V. et al. OBES SURG (2014) 24: 1064. doi:10.1007/s11695-014-1212-3



Bariatric surgery patients often exhibit low levels of physical activity (PA), despite the presumed importance of PA as an adjunct to surgery for successful weight loss. Little is known regarding the associations of PA and sedentary behaviors to weight loss outcomes in the long term following surgery. The objective of the study was to assess the associations of PA and sitting time with weight status, weight loss, and weight maintenance outcomes in bariatric patients 2–16 years postsurgery.


A total of 303 Roux-en-Y Gastric Bypass patients (73 % female; mean age 47 ± 10 years, mean 7 ± 4 years since surgery) completed a telephone questionnaire. Patients reported moderate-to-vigorous PA (MVPA: # sessions/week ≥30 min) and average daily sitting time (h/day). Associations with various weight outcomes were assessed.


Only 48 % of patients reported ≥1 session/week MVPA, and mean reported sitting time was 7 ± 4 h/day. Neither MVPA nor sitting time was associated with weight loss outcomes at patients’ lowest weight postsurgery. However, both MVPA and sitting time were independently positively and inversely, respectively, associated with total (kg) weight loss, % weight loss, and % excess weight loss at current weight, as well as weight loss maintained vs. regained, controlling for age, sex, surgery type, presurgery BMI, total initial weight loss, and time since surgery.


Results demonstrate associations between MVPA and high sitting time and weight loss outcomes among bariatric patients in the long term. The implications for long-term weight management and concomitant health outcomes highlight the need for appropriate follow-up and interventions in this unique high-risk patient population.


Obesity Metabolic surgery Exercise Sedentary behavior 



Body mass index


Excess weight loss


Roux-en-Y gastric bypass


Physical activity


Moderate-to-vigorous physical activity


Sedentary behavior


Standard deviation


Odds ratio


Confidence interval

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Katya M. Herman
    • 1
    • 3
  • Tamara E. Carver
    • 1
  • Nicolas V. Christou
    • 2
  • Ross E. Andersen
    • 1
  1. 1.Department of Kinesiology and Physical EducationMcGill UniversityMontrealCanada
  2. 2.Department of SurgeryMcGill UniversityMontrealCanada
  3. 3.Faculty of Kinesiology and Health StudiesUniversity of ReginaReginaCanada

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