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The number of calories burned naturally in a day depends on factors like age, gender, weight and activity level. On average, an inactive adult may burn around 1,600 to 2,400 calories a day, while ...
It can take up to 20 hours of little physical output (e.g., walking) to "burn off" 17,000 kJ (4,000 kcal) [17] more than a body would otherwise consume. For reference, each kilogram of body fat is roughly equivalent to 32,300 kilojoules of food energy (i.e., 3,500 kilocalories per pound or 7,700 kilocalories per kilogram).
The calorie is a unit of energy that originated from the caloric theory of heat. [1] [2] The large calorie, food calorie, dietary calorie, kilocalorie, or kilogram calorie is defined as the amount of heat needed to raise the temperature of one liter of water by one degree Celsius (or one kelvin).
Average daily dietary energy consumption per capita [8] Kilojoules (kJ) Year 1 Ireland: 16,250 2018 2 United States: 15,820 2018 3 Belgium: 15,770 2018 4 Turkey: 15,530 2018 5 Austria: 15,460 2018 6 Iceland: 15,290 2018 7 Romania: 14,980 2018 8 Canada: 14,920 2018 9 Germany: 14,870 2018 10 Poland: 14,800 2018 11 Israel: 14,760 2018 12 Italy: 14,660
For example, if you typically consume 3,500 calories per day, in order to lose a pound per week, you might shave 500 calories off of your daily caloric intake in order to lower your daily average.
In general, you burn 0 to 3 percent of the calories of fat you eat, 5 to 10 percent for carbohydrates, 20 to 30 percent for protein, and 10 to 30 percent for alcohol. 10 percent = 259 calories
Energy intake is measured by the amount of calories consumed from food and fluids. [1] Energy intake is modulated by hunger, which is primarily regulated by the hypothalamus, [1] and choice, which is determined by the sets of brain structures that are responsible for stimulus control (i.e., operant conditioning and classical conditioning) and cognitive control of eating behavior.
Obese individuals burn more energy than lean individuals due to increase in the amount of calories needed to maintain adipose tissue and other organs that grow in size in response to obesity. [2] At rest, the largest fractions of energy are burned by the skeletal muscles, brain, and liver; around 20 percent each. [ 2 ]