What affects how much energy your body burns?

The amount of energy your body burns, known as your total daily energy expenditure (TDEE), is influenced by several factors including basal metabolic rate (BMR), physical activity level, and the thermic effect of food. BMR accounts for the energy used at rest for vital functions, while physical activity encompasses all movements throughout the day. Additionally, factors like age, sex, muscle mass, and hormonal balance can also significantly impact energy expenditure. Overall, a combination of these elements determines how efficiently your body burns energy.