Has the constrained energy model been debunked? In 584 older adults, energy expenditure rose with activity, except in those losing weight, where it stayed flat
Oct 27
4 min read
The constrained energy model says your body has a rough daily energy budget: push activity up far enough and it quietly trims spending elsewhere, so total expenditure plateaus. If that were the whole story, adding more exercise for fat loss would be close to pointless. If it were false, every extra step would count in full. The evidence sits awkwardly between the two, and recent data suggest the answer depends on whether you are already in a deficit.
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