What is the third method of burning calories in the human body?

The third method of burning calories in the human body is Resting (Basal) Metabolic Rate. This method refers to the number of calories the body expends while at rest to maintain essential physiological functions, such as breathing, circulation, cell production, and thermoregulation. It is the energy required for the body to perform these critical functions when not engaging in any physical activity.

Understanding resting metabolic rate is fundamental because it constitutes the largest portion of total daily energy expenditure for most individuals, often accounting for about 60-75% of calories burned daily. This metric is influenced by several factors including age, sex, muscle mass, and hormonal balance, making it a significant consideration for anyone looking to manage weight or understand their energy needs.

The other methods, such as the thermic effect of food and physical activity, contribute to caloric burn in different ways but do not represent the body's continuous energy expenditure at rest. Exercise-induced thermogenesis is the energy used during physical activity, which can vary significantly based on the intensity and duration of the activity.