Accelerometer-Measured Versus Self-Reported Physical Activity Levels and Sedentary Behavior in Women Before and 9 Months After Roux-en-Y Gastric Bypass

作者：Berglind Daniel^*; Willmer Mikaela; Tynelius Per; Ghaderi Ata; Naslund Erik; Rasmussen Finn

来源：Obesity Surgery, 2016, 26(7): 1463-1470.

DOI：10.1007/s11695-015-1971-5

• Accelerometer
• Physical activity
• Sedentary behavior
• Roux-en-Y gastric bypass
• Self-report

Roux-en-Y gastric bypass (RYGB) patients report significant pre- to post-surgery increases in physical activity (PA). Conversely, objectively assessed PA does not increase after RYGB. The aim of the study was to compare self-reported and accelerometer-measured changes in moderate-to-vigorous PA (MVPA) and exercise from pre- to post-surgery, in women undergoing RYGB.
Forty-three women with an average pre-surgery body mass index of 39.2 kg/m2 (SD 3.1) were recruited at Swedish hospitals. PA was measured by the Actigraph GT3X+ and by a previously validated short PA questionnaire, at home visits 3 months before and 9 months after surgery, thus limiting seasonal effects.
Self-reported time spent in exercise increased with 75 % and time spent in MVPA increased with 51 %, whereas accelerometer-assessed time spent in exercise increased with 0.9 % and time spent in MVPA increased with 2.1 %, from before to after surgery. Correlations comparing accelerometers with the questionnaire were 0.35 (P = 0.02) for MVPA and 0.13 (P = 0.4) for exercise before RYGB and 0.52 (P a parts per thousand currency sign 0.001) for MVPA and 0.12 (P = 0.4) for exercise after RYGB.
Pre- to post-RYGB surgery increases in self-reported PA were not confirmed by accelerometer-measured PA. Thus, health care workers should use objective measures of PA in patients undergoing RYGB, in order to assess whether patients achieve sufficient levels of PA.

• 出版日期2016-7