Abstract
Why do some people remain slimmer than others? The answer may be in the amount of time lean individuals spend fidgeting, standing and walking around compared with sitting still. As Ravussin explains in a Perspective, a followup study by Levine et al. now pinpoints sitting as an important culprit of weight gain. Just sitting for 2.5 hours less each day would result in an extra energy expenditure of 350 kcal/day, which the authors calculate could translate into preventing the gain of extra pounds.