Abstract
Background
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.
Methods
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.
Results
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 ≤ 0.001) for MVPA and 0.12 (P = 0.4) for exercise after RYGB.
Conclusions
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.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with human participants or animals performed by any of the authors.
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The authors declare that they have no conflict of interest.
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Informed consent was obtained from all individual participants included in the study.
Funding
This study was funded by a grant to Finn Rasmussen from the Swedish Council for Working Life and Social Research (grant number: 2008–0654), Stockholm County Council (ALF), NovoNordisk fund, The National School in Caring Sciences at Karolinska Institutet (NFV).
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Berglind, D., Willmer, M., Tynelius, P. et al. Accelerometer-Measured Versus Self-Reported Physical Activity Levels and Sedentary Behavior in Women Before and 9 Months After Roux-en-Y Gastric Bypass. OBES SURG 26, 1463–1470 (2016). https://doi.org/10.1007/s11695-015-1971-5
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DOI: https://doi.org/10.1007/s11695-015-1971-5