School of Physiotherapy and Exercise Science, Faculty of Health Sciences, Curtin University, Perth, WA, 6845, Australia.
Medical School, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, WA, Australia.
Obes Surg. 2021 Jul;31(7):3015-3025. doi: 10.1007/s11695-021-05337-6. Epub 2021 Mar 13.
The aim of this study is to investigate changes in physical activity (PA) and sedentary time (ST) over 12 months following bariatric surgery.
Pre-surgery and at 3, 6, 9, and 12 months post-surgery, wearable devices were used to measure PA at different intensities, grouped according to energy expenditure and daily step count, and ST. Measures were also collected of weight and self-efficacy for exercise. Pre- and 12 months post-surgery, measures were collected of body composition and cardiovascular fitness.
Thirty adults scheduled for bariatric surgery were recruited (20 females, 44.1 [range, 22.0 to 65.0] years, body mass index 39.6 [range, 30.9 to 50.9] kg/m). When compared to pre-surgery measures, over the 12 months post-surgery, there were no changes in the percentage of waking hours (mean [95% CI]) spent in ST (- 2% [- 6 to 3]), light intensity PA (1% [- 3 to 5]), and moderate-to-vigorous intensity PA (1% [- 1 to 3]). At all time points, participants spent most (> 70%) of their waking hours accumulating ST, with little time spent in light intensity PA (~ 21%) and almost no time in moderate-to-vigorous intensity PA (~ 5%). Step count and cardiovascular fitness were also unchanged. There were significant changes in weight, self-efficacy for exercise, and body composition.
Although bariatric surgery resulted in substantial weight loss and improved self-efficacy for exercise, it was insufficient to effect change in PA, ST or cardiovascular fitness. Complementing surgical intervention with behavioral interventions may optimize change in PA and ST.
本研究旨在调查减重手术后 12 个月内身体活动（PA）和久坐时间（ST）的变化。
使用可穿戴设备在手术前和术后 3、6、9 和 12 个月测量不同强度的 PA，根据能量消耗和日常步数分组，并测量 ST。还收集了体重和运动自我效能的测量值。在手术前和手术后 12 个月，测量了身体成分和心血管健康状况。
共招募了 30 名计划接受减重手术的成年人（20 名女性，44.1[范围，22.0 至 65.0]岁，体重指数 39.6[范围，30.9 至 50.9]kg/m）。与术前测量值相比，术后 12 个月内，清醒时间（%[95%CI]）中 ST 所占比例无变化（-2%[-6 至 3]），低强度 PA（1%[-3 至 5]）和中高强度 PA（1%[-1 至 3]）。在所有时间点，参与者清醒时大部分时间（>70%）都在积累 ST，很少时间（21%）进行低强度 PA，几乎没有时间（5%）进行中高强度 PA。步长和心血管健康状况也没有变化。体重、运动自我效能和身体成分都有显著变化。
尽管减重手术导致了显著的体重减轻和运动自我效能的提高，但不足以改变 PA、ST 或心血管健康状况。将行为干预措施与手术干预相结合可能会优化 PA 和 ST 的改变。
