Daily energy expenditure is influenced by several variables, including basal metabolic rate (BMR), physical activity levels, and the thermic effect of food. BMR represents the energy expended at rest to maintain vital functions. Physical activity levels vary based on exercise habits and general movement throughout the day. The thermic effect refers to the energy used in digestion and metabolism of food consumed. Additionally, factors such as age, gender, and body composition play crucial roles in determining an individual’s overall daily energy expenditure.