The third exercise - Please help me fixing Calories What are the calories? Why do people think about or worry about their intake of calories? Calorie is the unit of energy. when you eat foods and drink beverages, you receive calories what they use for daily physical activity. So, calories are essential for human health. without them, human can not survive. the organs such as heart, lungs, brain would not be able to carry out their basic processed needed for living. However, the amount of calories are too lower or higher than daily consume make you face some health problems. It depends on different factors such as sex, age, size and activity level. Behind using the right level, you also avoid food or drinks contain empty calories what have little nutritional value. It is unlucky because of this type of calories has so much in yummy food and beverages such as fast food, gas drink... Using them mean we load empty calories and increase our risk of obesity, high blood pressure... So, we have better health if you can use the knowledge about calories by avoid them altogether and instead consume good health food such as water, fruit juice, vegetable, fish... behind, we can regularly enhance our activity level by doing lots exercise, gym, swimming ...