Abstract: An electronic device to measure the level of mental activity of an individual includes measurement structure for measuring the interval between every heart beat of the individual. The device also includes analysis structure that is constructed to perform a series of mathematical calculations ultimately to compute an index number for the individual. That index number is a measure of mental activity of the individual and is usable to predict the quality of the individual's performance in a desired activity.

Abstract: An electronic device to measure the level of mental activity of an individual includes measurement structure for measuring the interval between every heart beat of the individual. The device also includes analysis structure that is constructed to perform a series of mathematical calculations ultimately to compute an index number for the individual. That index number is a measure of mental activity of the individual and is usable to predict the quality of the individual's performance in a desired activity.

Abstract: An electronic device to measure the level of mental activity of an individual includes measurement structure for measuring the interval between every heart beat of the individual. The device also includes analysis structure that is constructed to perform a series of mathematical calculations ultimately to compute an index number for the individual. That index number is a measure of mental activity of the individual and is usable to predict the quality of the individual's performance in a desired activity.

Abstract: A method of enabling a person to reduce tension as a way of improving the possibility that the person will reach a desired level of performance during a tension-causing event includes the steps of selecting a monitor capable of measuring the heart rate of a person and including a display constructed to show heart-rate variability (HRV), and connecting a person to the monitor. The method also includes allowing the person to view the display of their own HRV while connected to the monitor, communicating to the person a desired range of HRV and an undesired range of HRV, and teaching the person how to breath to reach the desired range of HRV and to verify that the person reached the desired range of HRV by viewing the display. In addition, the method includes directing the person to think of a tension-causing event; and repeating the teaching step until the person reaches the desired range of HRV while thinking of the tension-causing event.

Abstract: An electronic device to measure the level of mental activity of an individual includes measurement structure for measuring the interval between every heart beat of the individual. The device also includes analysis structure that is constructed to perform a series of mathematical calculations ultimately to compute an index number for the individual. That index number is a measure of mental activity of the individual and is usable to predict the quality of the individual's performance in a desired activity.

Abstract: A method of enabling a person to reduce tension as a way of improving the possibility that the person will reach a desired level of performance during a tension-causing event includes the steps of selecting a monitor capable of measuring the heart rate of a person and including a display constructed to show heart-rate variability (HRV), and connecting a person to the monitor. The method also includes allowing the person to view the display of their own HRV while connected to the monitor, communicating to the person a desired range of HRV and an undesired range of HRV, and teaching the person how to breath to reach the desired range of HRV and to verify that the person reached the desired range of HRV by viewing the display. In addition, the method includes directing the person to think of a tension-causing event; and repeating the teaching step until the person reaches the desired range of HRV while thinking of the tension-causing event.

Abstract: A method of enabling a person to reduce tension as a way of improving the possibility that the person will reach a desired level of performance during a tension-causing event includes the steps of selecting a monitor capable of measuring the heart rate of a person and including a display constructed to show heart-rate variability (HRV), and connecting a person to the monitor. The method also includes allowing the person to view the display of their own HRV while connected to the monitor, communicating to the person a desired range of HRV and an undesired range of HRV, and teaching the person how to breath to reach the desired range of HRV and to verify that the person reached the desired range of HRV by viewing the display. In addition, the method includes directing the person to think of a tension-causing event; and repeating the teaching step until the person reaches the desired range of HRV while thinking of the tension-causing event.