Latent load calibration for calorimetry using sensor fusion
First Claim
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1. A method comprising:
- obtaining, by a heart rate sensor of a fitness tracking device, a heart rate measurement of a user of the fitness tracking device at a first sampling rate in response to determining that the user is in a particular activity session and at a second sampling rate at other times, wherein the first sampling rate is higher than the second sampling rate;
obtaining, by at least one motion sensor, motion data of the user;
analyzing, by the fitness tracking device, the motion data of the user to estimate a step rate of the user;
estimating, by the fitness tracking device, a load associated with a physical activity of the user by comparing the heart rate measurement with the step rate of the user; and
estimating, by the fitness tracking device, an energy expenditure rate of the user using a combination of the load and;
the heart rate measurement when the heart rate measurement is obtained at the first sampling rate, andthe step rate when the heart rate measurement is obtained at the second sampling rate.
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Abstract
In one aspect, the present disclosure relates to a method including obtaining, by a heart rate sensor of a fitness tracking device, a heart rate measurement of a user of the fitness tracking device; obtaining, by at least one motion sensor, motion data of the user; analyzing, by the fitness tracking device, the motion data of the user to estimate a step rate of the user; estimating, by the fitness tracking device, a load associated with a physical activity of the user by comparing the heart rate measurement with the step rate of the user; and estimating, by the fitness tracking device, an energy expenditure rate of the user using the load and at least one of the heart rate measurement and the step rate.
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Citations
20 Claims
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1. A method comprising:
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obtaining, by a heart rate sensor of a fitness tracking device, a heart rate measurement of a user of the fitness tracking device at a first sampling rate in response to determining that the user is in a particular activity session and at a second sampling rate at other times, wherein the first sampling rate is higher than the second sampling rate; obtaining, by at least one motion sensor, motion data of the user; analyzing, by the fitness tracking device, the motion data of the user to estimate a step rate of the user; estimating, by the fitness tracking device, a load associated with a physical activity of the user by comparing the heart rate measurement with the step rate of the user; and estimating, by the fitness tracking device, an energy expenditure rate of the user using a combination of the load and; the heart rate measurement when the heart rate measurement is obtained at the first sampling rate, and the step rate when the heart rate measurement is obtained at the second sampling rate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A fitness tracking device comprising:
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a heart rate sensor for measuring a heart rate of a user of the fitness tracking device at a first sampling rate in response to determining that the user is in a particular activity session and at a second sampling rate at other times, wherein the first sampling rate is higher than the second sampling rate; a motion sensor for sensing motion of the user; and a processor communicatively coupled to the heart rate sensor and the motion sensor, wherein the processor is configured to; obtain a heart rate measurement of the user from the heart rate sensor; obtain motion data of the user from the motion sensor; analyze the motion data of the user to estimate a step rate of the user; estimate a load associated with a physical activity of the user by comparing the heart rate measurement with the step rate of the user; and estimate an energy expenditure rate of the user using a combination of the load and; the heart rate measurement when the heart rate measurement is obtained at the first sampling rate, and the step rate when the heart rate measurement is obtained at the second sampling rate. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An article of manufacture comprising:
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a non-transitory processor readable storage medium; and instructions stored on the medium; wherein the instructions are configured to be readable from the medium by a processor of a fitness tracking device comprising a heart rate sensor and a motion sensor and thereby cause the processor to operate to; obtain a heart rate measurement of a user of the fitness tracking device from the heart rate sensor at a first sampling rate in response to determining that the user is in a particular activity session and at a second sampling rate at other times, wherein the first sampling rate is higher than the second sampling rate; obtain motion data of the user of the fitness tracking device from the motion sensor; analyze the motion data of the user to estimate a step rate of the user; estimate a load associated with a physical activity of the user by comparing the heart rate measurement with the step rate of the user; and estimate an energy expenditure rate of the user using a combination of the load and; the heart rate measurement when the heart rate measurement is obtained at the first sampling rate, and the step rate when the heart rate measurement is obtained at the second sampling rate. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification