The method makes it possible to determine body weight, body mass index, fat mass, musculoskeletal mass, lean soft tissue mass, total body water content, energy stored by the body, energy consumption at rest; mass indexes: the fat-free mass index, the fat mass index; the total energy consumption of the body, the amount of extracellular water, and the phase angle.The phase angle assesses the state of health, for example, a small phase angle signals a deterioration in health (malnutrition, alcoholism, infection or even a respectable age).