To estimate total daily energy expenditure (TDEE), what factor is applied to BMR?

• A. Calorie factor.
• B. Activity factor.
• C. Metabolic factor.
• D. Body weight factor.

Answer: (B)

Estimating TDEE means adjusting resting energy needs to account for daily activity. The number you multiply BMR by to do this is the activity factor, which reflects how active someone is—from sedentary to very active. Multiply BMR by that factor to arrive at TDEE, the total calories needed to maintain current weight.

BMR is the energy the body uses at rest, while TDEE includes energy for movement, workouts, digestion, and other daily activities. The activity factor changes with lifestyle, so more activity means a higher TDEE. Other terms like “calorie factor,” “metabolic factor,” or “body weight factor” aren’t standard multipliers used in this calculation, which is why the activity factor is the best fit.