Energy Balance

The difference between energy intake, how many kilocalories (kcal) we eat, and energy expenditure, how many kcal we burn, is termed energy balance. Eating the same number of kcal as you burn leads to a net energy balance of zero, and your current weight is maintained. Eating more or less kcal than you burn leads to positive (weight gain) or negative (weight loss) energy balances, respectively. See Figure

 

Kilocalorie

vs. Calorie

The correct term to describe food energy is kilocalorie (kcal). However, kcals and Calories (with a capital "C") are used interchangeably.

Nutrition and Exercise Resource Manual