Patent ID: 6675041
Filing Date: 2004-01-06
Classification: A61B,Y10S

Abstract:
A wrist wearable apparatus for comparing the net calorie intake of a user over a period of time, with a user defined target net calorie consumption, the apparatus comprising:(a) a housing; (b) a strap attached to the housing for attaching the housing to a user's wrist; (c) a user input on the housing; (d) a processor in the housing and connected to receive information from the user inputs; (e) a memory in the housing and accessible to the processor, the memory comprising: (i) a memory location for storing a calculated net calorie intake value; and, (ii) a memory location for storing a target net calorie consumption value representing a preferred net calorie consumption value for the user; (f) a heart rate monitor connected to the processor; (g) a timer in the housing connected to the processor; and, (h) a display on the housing, the display comprising an indicator and connected to the processor, wherein the processor is adapted to compute and display on the display a calculated net calorie intake value based upon:data entered by a user through the user input regarding the number of calories consumed by the user during a period of time; and a number of calories determined by the processor from data obtained by the processor from the timer and the heart rate monitor to have been expended by the user in exercise during the period of time wherein, when the apparatus is in an exercise mode, the processor executes instructions which cause it to cause the timer to start measuring an elapsed time in response to an input at the user input and, while the time is measuring the elapsed time, to compute from heart rate measurements made by the heart rate monitor, and display on the display, a number of calories expended by the user since the beginning of the elapsed time; and, wherein the processor calculates the number of calories expended by a user during an exercise session using the formula: CEXP=TÃ—(METÃ—3.5Ã—W)200or a mathematical equivalent thereof where: CEXP, is the number of calories expended by the user in the exercise session; T is the duration of the exercise session as measured by the timer; W is the user's weight in kilograms as recorded in the memory; and MET is a factor which is calculated for the user according to the user's gender, resting heart rate, age and measured heart rate.