Research
Energy balance
Postoperative Basic Metabolic Rate (BMR) decreases in proportion to weight loss after bariatric surgery, with no difference in BMR reduction between LGBP and LVBG, refuting the theory of postoperative hypermetabolism.
After bariatric surgery, your metabolic rate decreases as expected with your weight loss. There is no 'hypermetabolic' state that drives weight loss; instead, the reduction in energy expenditure is proportional to the loss of body mass.
StrongRefutesHIGH confidence
The decreases in BMR postoperatively reflected the lower body mass in a pattern that did not differ among the groups... The resting energy expenditure developed as expected postoperatively in both groups, ie, a reduction reflecting the amount of weight lost.
Why this rating
Randomized clinical trial with indirect calorimetry measurements.
Source
Body Composition, Dietary Intake, and Energy Expenditure After Laparoscopic Roux-en-Y Gastric Bypass and Laparoscopic Vertical Banded Gastroplasty
Torsten Olbers et al. · Annals of Surgery · 2006
DOI 10.1097/01.sla.0000218085.25902.f8
rct · n=83Cited 339×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Laparoscopic Roux-en-Y Gastric Bypass (LGBP) produces superior body composition outcomes compared to Laparoscopic Vertical Banded Gastroplasty (LVBG), specifically through greater reductions in total body fat, trunkal fat, and visceral adipose tissue, while better preserving lean tissue mass in men.Strong
- Laparoscopic Roux-en-Y Gastric Bypass (LGBP) induces a significant dietary shift towards lower fat intake and higher carbohydrate intake compared to Laparoscopic Vertical Banded Gastroplasty (LVBG), with approximately 30% of LGBP patients consciously avoiding fatty foods.Strong
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