DETECTING UNMEASURABLE LOADS USING HEART RATE AND WORK RATE
First Claim
1. A method for improving an accuracy of a wearable device while calculating an energy expenditure of a user, the method comprising:
- determining, by a processor circuit of the wearable device, a start of an exercise session for the user;
detecting, by the processor circuit, an exercise type associated with the exercise session wherein the exercise type is walking or running;
measuring, by a heart rate sensing module of the wearable device, heart rate data of the user, wherein the heart rate sensing module comprises a photoplethysmogram (PPG) sensor and the PPG sensor is configured to be worn adjacent to the user'"'"'s skin;
applying, by the processor circuit, a first time stamp to the measured heart rate data;
collecting, by one or more work rate sensing modules of the wearable device, work rate data of the user;
applying, by the processor circuit, a second time stamp to the collected work rate data;
calculating, by the processor circuit, a heart rate-based energy expenditure based on the heart rate data measured at the first time stamp;
calculating, by the processor circuit, a work rate-based energy expenditure based on the work rate data collected at the second time stamp;
determining, by the processor circuit, an energy expenditure of the user based on the calculated heart rate-based energy expenditure and the calculated work rate-based energy expenditure; and
outputting the energy expenditure of the user.
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Accused Products
Abstract
A method and a system for determining an energy expenditure of a user by detecting unmeasurable loads using heart rate and work rate are described. Time-stamped heart rate data and work rate data can be collected by one or more sensing modules. A processor circuit can calculate a heart rate-based energy expenditure and a work rate-based energy expenditure. The processor circuit can output a hybrid energy expenditure based on a heart rate confidence parameter, an exercise type, a fraction of heart rate reserve, and a hear rate-based metabolic equivalents of task.
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Citations
14 Claims
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1. A method for improving an accuracy of a wearable device while calculating an energy expenditure of a user, the method comprising:
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determining, by a processor circuit of the wearable device, a start of an exercise session for the user; detecting, by the processor circuit, an exercise type associated with the exercise session wherein the exercise type is walking or running; measuring, by a heart rate sensing module of the wearable device, heart rate data of the user, wherein the heart rate sensing module comprises a photoplethysmogram (PPG) sensor and the PPG sensor is configured to be worn adjacent to the user'"'"'s skin; applying, by the processor circuit, a first time stamp to the measured heart rate data; collecting, by one or more work rate sensing modules of the wearable device, work rate data of the user; applying, by the processor circuit, a second time stamp to the collected work rate data; calculating, by the processor circuit, a heart rate-based energy expenditure based on the heart rate data measured at the first time stamp; calculating, by the processor circuit, a work rate-based energy expenditure based on the work rate data collected at the second time stamp; determining, by the processor circuit, an energy expenditure of the user based on the calculated heart rate-based energy expenditure and the calculated work rate-based energy expenditure; and outputting the energy expenditure of the user. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for improving an accuracy of a wearable device while calculating an energy expenditure of a user, the system comprising:
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a heart rate sensing module configured to measure heart rate data of the user, wherein the heart rate sensing module comprises a photoplethysmogram (PPG) sensor and the PPG sensor is configured to be worn adjacent to the user'"'"'s skin; one or more work rate sensing modules configured to collect work rate data of the user; and a processor circuit in communication with the heart rate sensing module and the one or more work rate sensing modules and configured to execute instructions causing the processor circuit to; determine a start of an exercise session for the user; detect an exercise type associated with the exercise session, wherein the exercise type is walking or running; apply a first time stamp to the measured heart rate data; apple a second time stamp to the collected work rate data; calculate a heart rate-based energy expenditure based on the heart rate data measured at the first time stamp; calculate a work rate-based energy expenditure based on the work rate data collected at the second time stamp; determine an energy expenditure of the user based on the calculated heart rate-based energy expenditure and the calculated work rate-based energy expenditure; and output the energy expenditure of the user. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification