公开(公告)号：US10154789B2

公开(公告)日：2018-12-18

申请号：US14502827

申请日：2014-09-30

Applicant: Apple Inc.

Inventor： Karthik Jayaraman Raghuram ,  Hung A. Pham ,  Richard Channing Moore, III ,  Alexander Singh Alvarado ,  Umamahesh Srinivas ,  Xing Tan ,  Dan Marvin Trietsch ,  Gunes Dervisoglu ,  Craig H. Mermel ,  Ronald K. Huang ,  Adeeti Ullal

IPC: A61B5/00 ,  A61B5/0205 ,  A61B5/11 ,  A61B5/024 ,  A61B5/22 ,  A63B22/06 ,  G01C22/00

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.