Abstract: A system monitors surface heart rate variability (HRV) activity of a user and provides appropriate feedback to the user. The HRV feedback monitor is sized and configured to be worn by the user. In the depicted embodiment, heart rate variability is measured with electrodes integrally affixed to a housing of the system. Feedback is typically provided using vibrations of certain duration and repetition. The system operates under various user selectable operational modes. Each operational mode is associated with particular heart rate variability feedback criteria used to determine appropriate feedback for the user. The heart rate variability feedback criteria is related to signal levels and time measurements associated with heart rate variability measured of the user. The depicted embodiment includes a computer interface allowing HRV signal data recorded by the HRV feedback monitor to be sent to a computer system.

Abstract: A system to monitor respiration activity of a user and provide appropriate feedback to the user includes a respiration feedback monitor sized and configured to be worn by the user. In the depicted embodiment, respiration activity is measured with components including a retractable cord coupled to an optical distance measurement device. Feedback is typically provided using vibrations of certain duration and repetition. The system operates under various user selectable operational modes. Each operational mode is associated with particular respiration feedback criteria used to determine appropriate feedback for the user. The respiration feedback criteria is related to respiration rate levels and respiration depth associated with respiration activity level measured for the user. Distribution plots such as histograms associated with respiration measurement contribute to aspects of the feedback criteria and help establish other aspects of appropriate feedback.

Abstract: A system to monitor surface electromyographic (EMG) activity of a user and provide appropriate feedback to the user includes an EMG feedback monitor sized and configured to be worn by the user. In the depicted embodiment, surface EMG activity is measured with electrodes integrally affixed to a housing of the system. Feedback is typically provided using vibrations of certain duration and repetition. The system operates under various user selectable operational modes. Each operational mode is associated with particular electromyographic feedback criteria used to determine appropriate feedback for the user. The electromyographic feedback criteria is related to signal levels and time measurements associated with surface EMG activity level measured of the user. The depicted embodiment includes a computer interface allowing EMG signal data recorded by the EMG feedback monitor to be sent to a computer system.