Sedentary lifestyle cause of obesity

"At the population level, we found a significant association between the level of leisure-time physical activity, but not daily caloric intake, and the increases in both BMI and waist circumference," said Ladabaum. The study looked at the escalation of obesity in terms of both exercise and caloric intake. The investigators observed that total daily calorie, fat, carbohydrate, and protein consumption have not changed significantly over the last 20 years, yet the obesity rate among Americans is continuing to rise.