Objective Assessment of Time Spent Being Sedentary in Bariatric Surgery Candidates

Department of Psychiatry and Human Behavior, Warren Alpert Medical School of Brown University, The Miriam Hospital/Weight Control and Diabetes Research Center, 196 Richmond Street, Providence, RI 02903, USA.
Obesity Surgery (Impact Factor: 3.75). 06/2011; 21(6):811-4. DOI: 10.1007/s11695-010-0151-x
Source: PubMed


Bariatric surgery candidates spend very little time in moderate-to-vigorous intensity physical activity (≥ 3 metabolic equivalents [METs]). This study examined (1) how much of their remaining time is spent in sedentary behaviors (SB < 1.5 METs) compared to light-intensity activities (1.5–2.9 METs) and (2) whether sedentary time varies by BMI.
Daily time (hours, %) spent in SB was examined in 42 surgery candidates (BMI = 49.5 ± 7.9 kg/m2) using the SenseWear Pro2 Armband. Participants were stratified by BMI to assess the relationship between degree of obesity and SB.
Participants wore the armband for 5.4 ± 0.7 days and 13.3 ± 1.7 h/day. On average, 81.4% (10.9 ± 2.1 h/day)of this time was spent in SB. Participants with BMI ≥ 50 spent nearly an hour more per day in SB than those with BMI 35–49.9 (p = 0.01).
Bariatric surgery candidates spend over 80%of their time in SB. Reducing SB may help to increase physical activity in these patients.

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Available from: Jessica L Unick, Jun 06, 2014
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    • "Our previous research using objective measures shows that bariatric surgery-seekers have low physical activity levels and spend 80% of their time in sedentary behaviors [6,7]. However, it is not known whether equally overweight individuals seeking to lose weight via lifestyle intervention have similar levels of physical activity and sedentary behaviors. "
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    ABSTRACT: Background: Although regular exercise is a significant predictor of weight loss and weight loss maintenance, bariatric surgery patients are mostly sedentary/ low active presurgery, and up to 44% of these patients do not engage in regular exercise at 1 year postsurgery. Furthermore, of all postsurgical behavioral recommendations, exercise is the most likely area of nonadherence. The goal of this study was to evaluate adherence to a structured, postsurgical exercise program and to explore the preliminary efficacy of this program on trends in exercise frequency, duration, and intensity. Methods: Data on exercise behaviors during group exercise sessions and at home were collected from all 46 patients participating in a 12-week, structured, postsurgical exercise program. Linear regression was used to determine whether exercise behaviors changed over time. Results: The frequency and duration of at-home exercise increased from 3.3 (1.9) times per week for 37.4 (18.3) min/session at week 1 to 4.3 (1.7) times per week for 50.8 (23.3) min/session at week 12 (p<0.01 for increase in both frequency and duration). The level of exercise intensity during the weekly group exercise classes increased from 3.5 (0.9) METs (metabolic equivalents; equivalent to a moderate walking pace) at week 1 to 6.3 (2.9) METs (equivalent to a very brisk walking/slow jogging pace) at week 12 (p<0.01). Conclusions: The significant improvements in exercise behaviors observed during this group exercise program suggest that such programs are feasible, and may be effective in helping bariatric surgery patients meet the postsurgical exercise recommendations associated with improved weight loss and overall health.
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