Which activity contributes the most to energy expenditure according to the National Human Activity Pattern Survey?

Driving a car does contribute to energy expenditure, but it is generally considered a low-intensity activity. While people may spend a significant amount of time driving, this does not translate to high energy expenditure because the energy cost of driving is relatively low compared to other activities.

The activity that actually contributes the most to total energy expenditure is often associated with higher levels of physical activity, such as walking or doing housework. For instance, walking is a moderate-intensity exercise that increases heart rate and burns more calories than sedentary activities. Similarly, housework can involve more physically demanding tasks that require varying levels of energy.

Office work tends to be sedentary, and while it might occupy a lot of time during the day, it typically does not significantly contribute to energy expenditure. Therefore, the activity that contributes the most to energy expenditure according to the National Human Activity Pattern Survey is often activities like walking or household chores, rather than driving a car.