What lifestyle factor contributes to obesity, according to the text?

A sedentary lifestyle is a significant contributor to obesity as it leads to an imbalance between calorie intake and calorie expenditure. When individuals engage in minimal physical activity, they burn fewer calories, making it easier to gain weight if their caloric intake remains the same or increases. This lack of movement not only affects weight but can also lead to various health issues, such as cardiovascular disease and diabetes. In contrast, a lifestyle that incorporates regular physical activity promotes a healthier weight by enhancing metabolism and fostering a more active lifestyle. Thus, the emphasis on a sedentary lifestyle highlights the importance of movement in maintaining a healthy weight and overall well-being.