A groundbreaking study reveals that exercise plays a pivotal role in maintaining substantial weight loss, outperforming diet alone. Successful weight losers—those who shed 30 kilograms or more and kept it off for over a year—rely on physical activity to balance energy intake and expenditure, preventing regain without constant calorie restriction.
Key findings from the research:
- Daily total calories burned (and consumed) by successful weight losers were markedly higher (300 kcal/day) than in normal-weight controls, yet similar to overweight/obese individuals.
- Critically, calories burned through physical activity were significantly elevated (180 kcal/day more) compared to both normal-weight and overweight/obese groups. Even accounting for the extra energy cost of moving a larger body mass, successful losers expended more on exercise, indicating greater activity levels.
- This is evidenced by their average of 12,000 steps per day, versus 9,000 for normal-weight participants and 6,500 for those overweight or obese.
The study compared successful weight losers (current weight ~150 pounds) to two control groups: normal-weight individuals (BMI matching the losers' current BMI) and overweight/obese controls (BMI matching the losers' pre-loss BMI, ~213 pounds).
