NEAT (Non-exercise activity thermogenesis)

NEAT is the energy expended during all daily activity outside of structured exercise — walking, standing, fidgeting, household chores, and posture maintenance. It can vary by up to ~2,000 kilocalories per day between individuals of similar body size and often exceeds the contribution of formal workouts to total energy balance. Higher NEAT is associated with lower visceral adiposity, improved metabolic health, and reduced sedentary-time mortality risk, making it a meaningful longevity lever.