Life Insurance. The life insurance customer service team at Friends Life have four different telephone numbers; you should call the one that corresponds to the prefix before your policy number. Prefix â F or L, call: 0845 600 3122. Prefix â H, J or L, call: 0845 070 7099. Prefix â 3, call: 0845 300 1942.
Lean Body Mass vs. Muscle Mass. Lean Body Mass (also sometimes known as simply âlean mass,â likely the source of the word âlean muscleâ) is the total weight of your body minus all the weight due to your fat mass. It includes the weight of all your organs, your skin, your bones, your body water, and your muscles.
Subtract your lean body mass from your total body weight to calculate your body fat mass. Continuing with the example, 180 minus 141.1 calculates your body fat mass of 31.9 pounds. Divide your body fat mass by your total body weight and multiply by 100 to calculate your percent body fat.