Energy is needed for our bodies to function. We get our energy mainly from the food we eat. About 60% -70% of the body’s energy is spent on metabolism, 15% – 30% on physical activity, and 10% on heat production in the body.
The amount of energy the body needs per day varies from person to person. It varies depending on the person’s weight, age, gender, height, and amount of physical activity. There are a number of other factors that contribute to this. These include muscle mass, body fat, fasting, body growth rate, genetic, hormonal and neural activity, ambient temperature, infections or diseases, medications, and nutritional deficiencies.
A calorie is a unit used to measure energy. If you want to lose weight, you need to get less energy than your body expends every day.
BMR is the amount of energy needed to keep the body active when we are at rest after 12 hours of fasting.