Younger adults today often need to eat less and exercise more than their parents to maintain the same weight.
Obesity rates are rising worldwide, yet a comprehensive study of 36,400 adults shows it's not solely due to poorer diet or less activity in previous generations. Our parents simply maintained their weight more easily. If you're 25, for instance, you'd likely need stricter calorie control and more workouts than your parents did at your age to match their body weight. Researchers are still exploring the underlying reasons.
