The document discusses energy balance and factors that influence total daily energy expenditure and intake. It explains that energy balance occurs when energy intake equals energy expenditure, and that a positive or negative balance can affect body weight over time. It also outlines the components of total daily energy expenditure, including basal metabolic rate, physical activity, and the thermic effect of food. Key factors that can influence each of these components are described.

1. Energy Balance Getting the Equation to Work