Research
Energy balance
Small sustained changes in energy intake or expenditure do not produce large, long-term weight changes as predicted by the 3500-kcal rule due to physiological compensation.
Do not expect massive weight loss from tiny lifestyle tweaks like walking an extra mile or skipping two chips daily. Your body will compensate by lowering energy expenditure. To lose significant weight, you need larger, more substantial changes in energy intake or expenditure, or a combination of both, rather than relying on small, sustainable habits alone.
StrongRefutesHIGH confidence
Recent studies have shown that individual variability affects changes in body composition in response to changes in energy intake and expenditure, with analyses predicting substantially smaller changes in weight (often by an order of magnitude across extended periods) than the 3500-kcal rule does.
Why this rating
Based on confirmatory randomized studies and computational models cited in the text.
Source
Myths, Presumptions, and Facts about Obesity
Krista Casazza et al. · New England Journal of Medicine · 2013
DOI 10.1056/nejmsa1208051
narrative_reviewCited 438×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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