What is the activity multiplier for a sedentary lifestyle based on BMR + RMR?

The activity multiplier for a sedentary lifestyle is set at 1.2. This multiplier is used when calculating total daily energy expenditure (TDEE) based on the basal metabolic rate (BMR) or resting metabolic rate (RMR). A sedentary lifestyle typically means that a person has minimal physical activity beyond routine daily tasks.

In practical terms, the BMR represents the number of calories the body needs to maintain basic physiological functions while at rest, while RMR includes additional calories burned at rest in addition to BMR. Since individuals with a sedentary lifestyle do not engage in regular physical exercise, the activity multiplier reflects this lower energy expenditure. Using a multiplier of 1.2 gives a more accurate estimate of their total energy needs compared to higher multipliers that would correspond to more active lifestyles.