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Clinical Trial ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Physiol. | doi: 10.3389/fphys.2019.01048

Energy Compensation following a Supervised Exercise Intervention in Women living with Overweight⁄Obesity is Accompanied by an Early and Sustained decrease in Non-Structured Physical Activity

  • 1University of Ottawa, Canada
  • 2University of Leeds, United Kingdom
  • 3Université de Montréal, Canada

Background/Objectives: Body composition (BC) does not always vary as a function of exercise induced energy expenditure (exercise EE - resting EE). Energy balance variables were measured to understand energy compensation (EC) in response to an exercise intervention performed at low (LOW) or moderate (MOD) intensity.
Subjects/Methods: Twenty-one women with overweight/obesity (33±5 kg/m²; 29±10 yrs; 31±4 ml O2/kg/min) were randomised to a 3-month LOW or MOD (40 or 60% of , respectively) matched to expend 1500 kcal/week (compliance=97±5%). Body energy stores (DXA), energy intake (EI) (food menu and food diaries), resting EE (indirect calorimetry), total EE (doubly-labelled water), time spent in different activities (accelerometers), appetite (visual analogue scale), eating behaviour traits and food reward (liking and wanting) were assessed at baseline, after weeks 1 and 2 and at the end of the 3-month exercise intervention.
Results: EC based on BC changes (fat mass and fat-free mass) was 49±79% and 161±88% in LOW and MOD groups, respectively (p=0.010). EI did not change significantly during the intervention. However, eating behaviour traits and food reward had changed by the end of the 3-month supervised exercise. Non-structured physical activity (NSPA) decreased across the intervention (p<0.002), independent of the intensity of the exercise training.
Conclusion: Women with overweight/obesity training at LOW presented lower EC for a given energy cost of exercise. Our results strongly suggest that NSPA plays a major role in mediating the effects of exercise on energy balance and ultimately on changes in BC.

Keywords: exercise intensity, Energy compensation, Body Composition, Doubly labeled water (DLW), Obesity

Received: 19 Mar 2019; Accepted: 30 Jul 2019.

Copyright: © 2019 Riou, Jomphe-Tremblay, Lamothe, Finlayson, Blundell, Décarie-Spain, Gagnon and Doucet. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Dr. Éric Doucet, University of Ottawa, Ottawa, K1N 6N5, Ontario, Canada, edoucet@uottawa.ca