9 Computer-controlled apparatus for testing and measuring at least one of fat, water, bone mass, and muscle mass in a subject's body based on impedance measurements of the subject's body; Computer hardware and recorded software sold as a unit for use with medical patient monitoring equipment, for receiving, processing, transmitting and displaying data; Computer hardware and recorded software systems for measuring, analyzing and assessing at least one of fat, water, bone mass, and muscle in a subject's body based on impedance measurements of the subject's bodymeasuring, analyzing and assessing at least one of fat, water, bone mass, and muscle in a subject's body based on impedance measurements of the subject's body; Computer hardware and recorded software for operating medical imaging apparatus sold as a unit; Computer software for monitoring personal athletic health and fitness, namely, software for tracking and monitoring of one or more of an individual's body fat, muscle mass, water weight, bone density, and/or cardiovascular levels that may be downloaded from a global computer network; Downloadable computer software for the collection, editing, organizing, modifying, book marking, transmission, storage, and sharing of data and information; Downloadable computer software for tracking and monitoring at least one of heart rate, body fat, water weight, muscle mass, bone density and/or cardiovascular output; Downloadable software in the nature of a mobile application for monitoring personal athletic health and fitness, namely, software for tracking and monitoring of one or more of an individual's body fat, muscle mass, water weight, bone density, and/or cardiovascular levels; Pressure measuring apparatus; Scales; Scales with body mass analyzers; Scientific instrumentation for measuring assessing and analyzing a person's body composition, namely, for determining the levels of fat, water, bone mass and muscle in a subject's body based on impedance measurements of the subject's body