Everything our body does – breathing, sleeping, running or just thinking – uses energy. Energy also keeps trillions of body cells working. The food you eat supplies energy that keeps the body going.
Energy levels
Different foods contain varying amounts of energy when broken down inside the body. The energy the body gets from a particular food or drink is measured in calories. The amount of energy a body needs depends on many factors. Teenagers need more energy than adults because they are still growing. Men need to take in more calories than women as they are usually bigger and have more energy-consuming muscle.
Energy needs
People’s individual energy needs vary a huge amount. Very active people use lot energy, so they need more calories from their food.
Karate kicks
People who participate in sports use up to three time more calories than inactive people.
Using energy
Everything we eat contains certain amount of energy, and everything we do uses energy. Balancing calories we take in with the activities we do is key to staying healthy.
Fuelling activity
A banana contains about 100 calories. Depending on the activity that you do, that amount of energy will fuel you for different lengths of time.
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