This pilot study will use a crossover design to explore the effects of acute exercise following bariatric surgery on food intake, energy expenditure, appetite, food reward, appetite hormones, and inflammatory response. Participants will take part in a moderate-intensity exercise session and control condition of 50 minutes. The energy balance will be assessed for 3 days following the condition by giving the participants all the food they can consume for 3 days and having them wear an accelerometer. The investigators hypothesize that post-gastric bypass participants with higher weight regain will have a higher compensation in response to exercise, thus an increase in food intake and/or a decrease in total energy expenditure after exercise compared to participants with less weight regain; also post-gastric bypass participants with a higher weight regain will have a lower inflammatory response to exercise compared to the group with less weight regain.
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Change of energy intake between rest and exercise conditions (kcal/d)
Timeframe: At least one week after baseline evaluation (visit 2) and 15 days to a maximum of 2 months after visit 2
Change of total energy expenditure post-experimentation between rest and exercise conditions (kcal/d)
Timeframe: At least one week after baseline evaluation (visit 2) and 15 days to a maximum of 2 months after visit 2