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Predictors of Physical Activity After Gastric Bypass - a Prospective Study

Lookup NU author(s): Professor Falko Sniehotta


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© 2017 Springer Science+Business Media New York Background: Most patients do not meet the recommended level of physical activity after bariatric surgery, and psychological factors underlying postoperative physical activity remain poorly understood. This study aimed at identifying self-regulatory predictors of physical activity after bariatric surgery. Methods: Questionnaire data including self-regulation variables and the short-version of the International Physical Activity Questionnaire were obtained in a prospective cohort of 230 patients 1 year after Roux-en-Y gastric bypass. The study sample consisted of participants consenting to wear an ActiGraph GT3X+ accelerometer for seven consecutive days, 18–24 months after surgery (n = 120). Results: A total of 112 participants with complete self-report data provided valid accelerometer data. Mean age was 46.8 years (SD = 9.3), and 81.3% was women. Preoperative and postoperative BMI was 44.8 ± 5.5 and 30.6 ± 5.0 kg/m2, respectively. Total weight loss was 28.9% (SD = 7.5). By objective measures, 17.9% of the participants met the recommended level of moderate-to-vigorous-intensity of physical activity of ≥150 min/week, whereas 80.2% met the recommended level according to self-reported measures. Being single, higher education level, and greater self-regulation predicted objective physical activity in multivariate regression analysis. Greater self-regulation also predicted self-reported physical activity. Weight loss 1 year after surgery was not associated with self-reported or objectively measured physical activity. Conclusions: Despite large differences between accelerometer-based and subjective estimates of physical activity, the associations of self-regulatory factors and weight loss with postoperative physical activity did not vary depending on mode of measurement. Self-regulation predicted both objective and self-reported physical activity. Targeting patients’ self-regulatory ability may enhance physical activity after gastric bypass.

Publication metadata

Author(s): Bergh I, Kvalem IL, Mala T, Hansen BH, Sniehotta FF

Publication type: Article

Publication status: Published

Journal: Obesity Surgery

Year: 2017

Volume: 27

Issue: 8

Pages: 2050-2057

Print publication date: 01/08/2017

Online publication date: 16/02/2017

Acceptance date: 02/04/2016

ISSN (print): 0960-8923

ISSN (electronic): 1708-0428

Publisher: Springer New York LLC


DOI: 10.1007/s11695-017-2593-x


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