Final answer:
True, most U.S. children's lack of physical fitness is associated with increased sedentary activities, such as excessive TV watching, and poor dietary habits.
Step-by-step explanation:
The statement that most U.S. children are not physically fit, in part because of the amount of time spent watching TV, is largely considered to be true. Research and initiatives like the Let's Move! Campaign spearheaded by former first lady Michelle Obama, indicate that the rate of childhood obesity is indeed on the rise. Factors contributing to this include high levels of sedentary behavior, such as watching television and engaging in stationary activities like playing video games, combined with a diet high in processed foods and low in nutritious options like fruits, vegetables, and whole grains.
These habits can lead to an imbalance between calories consumed and calories burned, which is a central component of weight gain and obesity. Engaging children in more physical activity and ensuring they have a balanced diet are critical steps in combating this trend. As supported by evidence, children who have limited access to junk food and partake in more physical activities tend to have better fitness levels and are less likely to be obese.