Understanding energy balance is critical for promoting healthy weight management. It refers to the relationship between calories consumed through food and beverages and calories expended through physical activity and metabolism. Maintaining a balance where energy intake equals energy expenditure is essential for weight maintenance. To lose weight, one must create a negative energy balance by reducing caloric intake or increasing physical activity. Conversely, gaining weight requires a positive energy balance. By grasping these principles, individuals can make informed choices that support their health and fitness goals.