Posts tagged losing weight
What are calories, carbs, engergy and joule ?

Energy is a strange concept. It sounds simple. You gain energy by something, and the something can cost you energy. You can get energy from eating food, for example, but at the same time a large dinner can also make you feel tired. Your energy bill all use kWh, at school you learn about joule, and you can track your calorie intact when you go on a diet. But what is energy exactly, and why does energy matter?

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