To find lean body mass, which formula is used?

The formula for calculating lean body mass is based on the concept that lean body mass comprises everything in the body except for fat mass. To find this, one can start with total body weight (scale weight) and subtract the amount of fat mass from it.

Using the formula that involves subtracting fat mass from scale weight, it effectively isolates the lean components of the body, which include muscles, bones, organs, water, and other tissues that do not contain fat. This calculation provides a clear and accurate measure of lean body mass, which is important for understanding body composition, setting fitness goals, and assessing health status.

In this context, other options do not correctly represent the relationship between scale weight, fat mass, and lean body mass. The incorrect choices either add fat mass to scale weight or incorrectly combine components that do not logically lead to the calculation of lean body mass.