Foods provide us with the nutrients we need for healthy bodies and the calories we need for energy. If we eat too much, however, the extra food turns to fat and is stored in our bodies. If we overeat regularly, we gain weight, and if we continue to gain weight, we may become obese.
A lack of energy balance most often causes overweight and obesity. Energy balance means that your energy IN equals your energy OUT. Energy IN is the amount of energy or calories you get from food and drinks. Energy OUT is the amount of energy your body uses for things like breathing, digesting, and being physically active.
To maintain a healthy weight, your energy IN and OUT don't have to balance exactly every day. It's the balance over time that helps you maintain a healthy weight.
The risk factors and contributory causes of obesity - a disease of excess body fat characterized by a body mass index of 30+ - include a range of well-documented genetic and environmental factors. Before examining possible causes, note that obesity, especially severe clinical obesity like morbid or malignant obesity, carries greater risks of morbidity and premature mortality than simple overweight.
A lack of energy balance most often causes overweight and obesity. Energy balance means that your energy IN equals your energy OUT. Energy IN is the amount of energy or calories you get from food and drinks. Energy OUT is the amount of energy your body uses for things like breathing, digesting, and being physically active.
To maintain a healthy weight, your energy IN and OUT don't have to balance exactly every day. It's the balance over time that helps you maintain a healthy weight.
- The same amount of energy IN and energy OUT over time = weight stays the same
- More energy IN than energy OUT over time = weight gain
- More energy OUT than energy IN over time = weight loss
The risk factors and contributory causes of obesity - a disease of excess body fat characterized by a body mass index of 30+ - include a range of well-documented genetic and environmental factors. Before examining possible causes, note that obesity, especially severe clinical obesity like morbid or malignant obesity, carries greater risks of morbidity and premature mortality than simple overweight.
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