The connection between energy balance and body weight is fundamental in understanding how body weight is maintained or altered. Energy balance refers to the relationship between calories consumed and calories expended through metabolism and physical activity. Consuming more calories than expended leads to weight gain, while expending more results in weight loss. Achieving a stable weight requires a balance between these factors, whereas changes often prompt adjustments in diet and exercise. Consequently, understanding energy balance is crucial for effective weight management and overall health.