ABSTRACT Objective This cross‐sectional study examined associations between sleep, body weight, body composition, appetite, and food reward after bariatric surgery. Methods A single 7‐day study period in 22 female adults (age, 53.5 ± 9.3 years; BMI, 35.5 ± 8.5 kg/m 2 ; body fat: 44.9% ± 8.6%) who underwent bariatric surgery ≥ 1 year prior to enrollment assessed: actigraphy‐measured sleep (duration, efficiency, midpoint, and variability coefficient of variation) and activity energy expenditure (AEE); sleep architecture and apnea‐hypopnea index (AHI) via in‐home polysomnography; energy intake via food diaries; resting EE via indirect calorimetry; fasting appetite via visual analog scales; and food reward via Leeds Food Preference Questionnaire. Results Weight regain was 10.6% relative to nadir postsurgery weight. Rapid eye movement (REM) sleep duration was associated with lower body fat percentage ( r = −0.52, p = 0.02). Participants with AHI ≥ 5 had a greater waist to hip ratio compared to those with AHI < 5 (mean difference = 0.09, p = 0.01). Sleep timing and duration variability was associated with fasting prospective food consumption ( r = 0.44, p = 0.05 and r = 0.47, p = 0.03, respectively). Greater sleep duration was associated with lower AEE ( r = −0.62, p < 0.01) and explicit liking for sweet foods ( r = 0.45, p = 0.04). Conclusions Our exploratory results underscore the need to evaluate whether sleep behaviors, including total and REM sleep duration, AHI, and sleep regularity, predict long‐term weight loss maintenance after bariatric surgery.
Koch et al. (Wed,) studied this question.
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