what fraction of the total body mass is fat?
“A person’s body fat percentage is the total weight of the person’s fat divided by the person’s weight and consists of essential body fat and storage body fat. Essential body fat is necessary to maintain life and reproductive functions. The percentage for women is greater than that for men, due to the demands of childbearing and other hormonal functions. Essential fat is 3–5% in men, and 8–12% in women. Storage body fat consists of fat accumulation in adipose tissue, part of which protects internal organs in the chest and abdomen. The minimum recommended total body fat percentage exceeds the essential fat percentage value reported above. A number of online tools are available for calculating estimated body fat percentage.” “Different cultures value different body compositions differently at different times, and some are related to better health or improved athletic performance. Levels of body fat are epidemiologically dependent on gender and age.
