Diet and physical activities: Knowledge of energy balance

Abstract

Diet and exercises always go hand in hand for fitness. One way to get energy is through food, and another way to spend energy by physical activities. In both cases, the unit remains the same: kilo calories (kcal) or kilo Jules (kJ). Kcal and Calories are used interchangeably, which denotes the same amount of energy. In science, one calorie (kcal) equals 4.18 kJ. The USA, and Canada, typically use calories on the packaging of the food products, whereas European Union, Australia, and New Zealand use both kcal or KJ. China follows specifically KJ and India kcal (calories).