Sensor-based detection of changes in health and ventilation threshold

A method of monitoring health status of a user, comprising:

• determining, using a processor, a baseline biological marker for the user, wherein the baseline biological marker includes respiratory rhythm;
• receiving, using the processor, sensor data;
• in response to detecting that the user is performing physical activity, determining, using the processor, a biological marker from the sensor data;
• comparing, using the processor, the biological marker with the baseline biological marker;
• and
• in response to detecting a change in the biological marker, providing, using the processor, a notification indicating a change in health status.

A computer program product comprising a computer readable storage medium having program code stored thereon for monitoring health status of a user, the program code executable by a processor to perform operations comprising:

• determining a baseline biological marker for the user, wherein the baseline biological marker includes respiratory rhythm;
• receiving sensor data;
• in response to detecting that the user is performing physical activity, determining a biological marker from the sensor data;
• comparing the biological marker with the baseline biological marker;
• and
• in response to detecting a change in the biological marker, providing a notification indicating a change in health status.

An apparatus for evaluating ventilation threshold, comprising:

• a sensor adapted to generate sensor data;
• a memory adapted to store a baseline rating of perceived exertion (RPE), a baseline heart rate, and a biological marker each corresponding to ventilation threshold for a user;
• a processor coupled to the memory and the sensor, wherein the processor is adapted to:
• receive an input specifying an estimate of RPE in response to determining that the sensor data matches the biological marker;
• determine a current heart rate for the user from the sensor data in response to determining that the baseline RPE is achieved based upon the input;
• compare the current heart rate for the user with the baseline heart rate to detect a change in ventilation threshold for the user;
• and
• send a notification in response to detecting the change in the ventilation threshold for the user.