Physical performance monitoring and monitors
Methods and systems are disclosed for determining an anaerobic threshold and/or an oxygen consumption rate in a human or animal subject. The methods include exposing a tissue of the subject to illumination radiation, collecting emitted radiation from the tissue, the emitted radiation including a portion of the illumination radiation reflected or transmitted from the tissue, processing the emitted radiation to form a spectrum of the tissue, and determining, based on the spectrum of the tissue, the anaerobic threshold and/or the oxygen consumption rate of the subject.
1. An apparatus, comprising:
a spectrometer configured to detect light emitted from a tissue of a human or animal subject, and to determine a spectrum of the tissue from the detected light; and
an electronic processor coupled to the spectrometer and configured to:
determine a plurality of spectra of the tissue;
determine a plurality of pH values of the tissue, wherein each one of the plurality of pH values is obtained from a different one of the plurality of spectra; and
determine an anaerobic threshold of the subject based on the plurality of pH values of the tissue and on corresponding values of a measure of exercise intensity.
2. The apparatus of claim 1 , wherein the spectrometer comprises:
at least one light source;
one or more incident light ports configured to transmit light from the at least one light source to the tissue; and
one or more light receiving ports configured to transmit light from the tissue to a detector,
wherein the one or more incident light ports and the one or more light receiving ports are enclosed in a housing that comprises an attachment mechanism for attaching the housing to a portion of a subject's body.
3. The apparatus of claim 2 , wherein the at least one light source comprises a plurality of light emitting diodes.
4. The apparatus of claim 2 , wherein:
the one or more light receiving ports comprise one light receiving port;
the one or more incident light ports comprise a first light port positioned at a first distance from the light receiving port and a second light port positioned at a second distance, shorter than the first distance, from the light receiving port; and
the electronic processor is configured to correct spectral data derived from light from the first light port with spectral data derived from light from the second light port.
5. The apparatus of claim 1 , further comprising a communication interface in electrical communication with the electronic processor, the communication interface being configured to transmit signals from the electronic processor to a device over at least one of a communication link and a network.
6. The apparatus of claim 5 , wherein the device is at least one of a computer, a handheld computing device, a mobile telephone, and a display device.
7. The apparatus of claim 5 , wherein the signals comprise information about the subject, and the device is a computing device configured to monitor the information about the subject.
8. A system, comprising:
an electronic device connected to a data transmission network; and
a plurality of monitoring devices, each monitoring device corresponding to the apparatus of claim 1 ,
wherein each monitoring device is configured to transmit information about one of multiple human or animal subjects to the electronic device over the data transmission network, the information comprising at least one of the oxygen consumption rate and the anaerobic threshold of the subject.
9. The apparatus of claim 1 , wherein the measure of exercise intensity comprises an oxygen consumption rate.