A device for measuring and displaying body parameters includes a sensor that generates a signal representing a detected body parameter, such as body fat, body water and weight, and blood pressure of an individual; a transmitter to wirelessly transmit the signal; a receiver to receiver and display the sensed measurements as well as a user's name, time, date and temperature. The invention also pertains a method for determining fitness comprising the steps of: inputting, data pertaining to one of date, time, an individual's name, and fitness statistics, sensing parameters of one or more of a body fat, a body water, blood pressure and a weight; recording sensed parameters and said data; and transmitting the sensed parameters and said data; receiving said sensed parameters and said data and a signal proportional to a temperature and displaying one or more of said sensed parameters, data and temperature on a portable display unit.