Abstract: The present invention includes methods, systems, and apparatus for measuring a pulse rate. One aspect includes a method for measuring a pulse rate of an individual. The method can include providing at least one sensor adapted to monitor a pulse associated with a user, and further adapted to monitor motion associated with the user. Furthermore, the method can include detecting a pulse associated with a user with the at least one sensor, and detecting motion associated with a user with the at least one sensor. In addition, the method can include generating a signal based at least on the detected pulse associated with the user, and modifying the signal based at least on the motion associated with the user. Moreover, the method can include determining a pulse rate associated with the user based at least on the modified signal.

Abstract: The invention relates to methods, systems, and apparatus for monitoring within-day energy balance deviation. One aspect of the invention includes a method for automatically determining an energy balance deviation associated with a person that includes providing a device capable of being worn by or accompanying the person, the device adapted to receive information related to the person's energy expenditure, energy intake, and to display energy balance information. The method also includes receiving at least one input associated with energy expenditure of a person, receiving at least one input associated with energy intake of the person, and calculating an energy balance function based in part on the energy expenditure and the energy intake over a period of time. Furthermore, the method includes designating at least one boundary for comparison to said energy balance function, and displaying information corresponding to said energy balance function and said at least one boundary.