We need calories or energy to do the things we do every day: walking, cycling and even sleep! We get calories from the food we eat. If we eat too much, we can get fat. If we don't eat enough, we feel tired and weak. People should get between 1600 and 2500 calories a day to stay fit. Sports like cycling and running use a lot of calories. Sleep and watch TV use less. Do you think you're eating more or less calories?
@byklinh321
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