Method and system for anaerobic threshold heart rate detection

• US 10,159,444 B2
• Filed: 12/21/2015
• Issued: 12/25/2018
• Est. Priority Date: 12/21/2015
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Lin, Hsing-Chen, Wang, Jong-Shyan, Weng, Chi-Hsiang, Huang, Ching-Yu, Hsueh, Wen-Chung
• Primary Examiner(s): Kahelin, Michael
• Application Number:
  US14/976,831
• Publication Number:
  US 20170172513A1
• Time in Patent Office: 1,100 Days
• CPC Class Codes: A61B 2503/10 Athletes
• CPC Class Codes: A61B 5/0086 using infrared radiation
• CPC Class Codes: A61B 5/0245 by using sensing means generating electric signals, i.e. ECG signals
• CPC Class Codes: A61B 5/352 Detecting R peaks, e.g. for synchronising diagnostic apparatus; Estimating R-R interval
• CPC Class Codes: A61B 5/6802 Sensor mounted on worn items
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/6898 Portable consumer electronic devices, e.g. music players, telephones, tablet computers
• CPC Class Codes: A61B 5/7235 Details of waveform analysis A61B5/349 takes precedence
• CPC Class Codes: A61B 5/7246 using correlation, e.g. template matching or determination of similarity
• CPC Class Codes: A61B 5/7282 Event detection, e.g. detecting unique waveforms indicative of a medical condition A61B5/4094, A61B5/4818, A61B5/349, A61B5/0823 take precedence

Abstract

The disclosure provides a method and system for detecting an anaerobic threshold heart rate. After first physiological data, second physiological data and third physiological data are obtained while a user is exercising, an interval of the third physiological data corresponding to an estimated range of first physiological data and a turning point of a curve fitting the third physiological data within the interval are obtained, to determine the anaerobic threshold heart rate of a user.

Claims

1. A system for detecting an anaerobic threshold heart rate of a user, comprising:

a heart rate sensor configured to obtain first physiological data and second physiological data while the user is exercising; and

a microprocessor configured to receive the first physiological data and the second physiological data from the heart rate sensor and configured to implement a first calculating module and a second calculating module;

the first calculating module configured to calculate third physiological data according to the second physiological data; and

the second calculating module configured to obtain an interval of the third physiological data corresponding to an estimated range of the first physiological data, and obtain a turning point of a curve fitting the third physiological data within the interval to determine the anaerobic threshold heart rate of the user,

wherein the first physiological data is heart rate data, the second physiological data is R-R interval data or peak-to-peak interval data, and the third physiological data is standard deviation of normal-to-normal data.

2. The system of claim 1, wherein the second calculating module is configured to obtain the estimated range of the first physiological data by multiplying a confidence interval of a statistical distribution of estimated maximum heart rates for adults corresponding to the age of the user by a percentage.

3. The system of claim 1, wherein the second calculating module is configured to determine the turning point by a curvature or slope of the curve.

4. The system of claim 3, wherein the second calculating module is configured to lie the turning point at a peak of the curvature of the curve, and the second calculating module is configured to determine the anaerobic threshold heart rate of the user by the first physiological data corresponding to the turning point.

5. The system of claim 1, wherein the second calculating module is configured to lie the turning point in a position where the third physiological data within the interval is less than a threshold, and the second calculating module is configured to determine the anaerobic threshold heart rate of the user by the first physiological data corresponding to the turning point.

6. The system of claim 1, wherein the second calculating module is configured to lie the turning point in a position where the curve of the third physiological data within the interval goes down gradually with time and tends to become flat, and the second calculating module is configured to determine the anaerobic threshold heart rate of the user by the first physiological data corresponding to the turning point.

7. The system of claim 1, wherein the second calculating module is configured to obtain the first physiological data and the second physiological data as the first physiological data of the user reached at least a target and the first physiological data and the third physiological data kept flat for a time duration.

8. The system of claim 7, wherein the second calculating module is configured to calculate the target by the following equation:

z=an estimated maximum heart rate for adults×

y,

wherein z represents a heart rate, and y is in a range varied from 20% to 80%.

9. The system of claim 1, wherein the microprocessor further comprises a prompt module configured to control a prompt device according to the first physiological data or the anaerobic threshold heart rate of the user.