The term for a state of balance in energy intake and expenditure is energy equilibrium. This balance is achieved when the number of calories consumed through diet matches the number of calories burned through physical activity and metabolic processes. Maintaining energy equilibrium is essential for sustaining weight and promoting overall health. A chronic imbalance, whether through excessive intake or insufficient expenditure, can lead to weight gain or loss. Thus, energy equilibrium is a fundamental concept in nutrition and weight management, affecting both physical health and fitness performance.