NEAT stands for non-exercise activity thermogenesis: all the calories you burn through movement that isn't a workout. Walking to the store, carrying groceries, cleaning the house, pacing on a phone call, fidgeting at your desk. It sounds trivial, but it can differ by hundreds to over a thousand calories a day between two people of the same size.
Why it matters
For most people, NEAT burns more calories than exercise does. A hard hour in the gym might cost 300 to 500 calories. An active day of walking and errands can quietly beat that. NEAT is also the sneaky reason fat loss stalls: when you diet, your body nudges you to move less without you noticing. You sit more, fidget less, take the elevator. The deficit shrinks, and the scale stops.
So NEAT cuts both ways. It's the biggest lever you're probably not tracking.
How to use it in training
Set a daily step target and treat it like a training variable. Somewhere between 7,000 and 10,000 steps works for most people; the exact number matters less than hitting it consistently. Walks after meals, parking farther away, taking calls on your feet. Small stuff, stacked daily.
During a fat-loss phase, watch your step count instead of trusting how active you feel. If steps drift down while calories stay the same, your deficit is quietly evaporating. Bump the steps back up before you cut food further.
Related terms
Go deeper
Want the research behind it? Read our full breakdown: The science of NEAT.