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Physical activity before and after sleeve gastrectomy surgery and relationship to one year weight loss.
Richard Seip, Erika Renkl, Gabrielle Eustache, Darren Tishler, Tara McLaughlin, Diana King, Godfrey Pearlson, Devika Umashanker, Marinka Koenis, Pavlos Papasavas
Hartford Hospital, Hartford, Connecticut, United States

Objective: To describe weekly energy expenditure of voluntary physical activity pre- and one year post-sleeve gastrectomy (SG) and to investigate the relationship between physical activity and weight change post-surgery in a small cohort of patients. Design: This was a prospective observational study. Setting: Accredited, high-volume bariatric surgery center. Patients: 19 patients underwent SG between February 2019 - February 2020. Interventions: This was not a treatment study. Main outcome measures: 7 day vector magnitude (representing total physical activity) and mean daily kilocalories (based on data from triaxial accelerometry (Actigraph GTX3)), proportion of movement classified as light, moderate, vigorous, and very vigorous, mean BMI and % total weight loss (%TWL) at one year after surgery. Results: Triaxial accelerometry data were available for 18 patients (15 female; baseline age 44.89.2 years; BMI 41.86.1 kg/m2) pre- surgery. At 1 year following surgery the mean BMI decreased to 31.95.8 kg/m2 and the % total weight loss (%TWL) was 23.49.6%. Actigraph 7d vector magnitude decreased from 5.01x106 counts pre- to 4.45x106 post-surgery (p=0.012), largely due to a 5.7% decrease in the volume of moderate activity (p=0.001). The mean daily energy expenditure attributable to physical activity decreased from 833522 kcal pre- to 488392 post-surgery (p<.001). At 1 year following surgery, no markers of physical activity were correlated with %TWL. One trend was observed: minutes of very vigorous post-surgical physical activity were correlated with %TWL (r=0.424; p=0.08). Conclusion: In this ongoing study of sleeve gastrectomy patients, physical activity did not spontaneously increase but, unexpectedly, decreased at 1 year post-surgery. Variability in %TWL was unrelated to various measures of voluntary physical activity.


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