System for training a subject to improve psychophysiological function for performance under stress

1. A computer-implemented system for training a subject to improve psychophysiological function for performance of a stress-inducing activity, the system comprising:

a sensor interface device having:

a microcontroller, including an analog-to-digital converter and a processor;

a set of sensor inputs coupled through the analog-to-digital converter to the processor, each sensor input being connectable to a corresponding sensor, in a set of sensors, that is coupled to the subject so as to measure a physiological parameter of the subject, the physiological parameter indicating stress in the subject, wherein the processor is programmed to receive from the set of sensors a measurement stream that quantifies, for each one of the set of sensors, the stress-indicating physiological parameter; and

an output port, coupled to the processor, that is configured to be coupled to a computer system, wherein the processor is programmed to communicate the measurement stream to the computer system using the output port; and

a non-transitory, tangible computer readable storage medium storing computer program code that, when executed by the computer system:

provides a profiling segment in which the stress-indicating physiological parameter and a baseline value of the stress-indicating physiological parameter are determined; and

provides a set of training segments, until the computer system determines that a value of the stress-indicating physiological parameter is within a pre-defined range of the baseline value of the stress-indicating physiological parameter, each training segment in the set presenting the subject with one or more visual, audible, or tactile prompts or a combination of such prompts using the output port, wherein at least one of the training segments simultaneously presents the subject with a stress-inducing prompt while inducing the subject to perform a relaxation-inducing protocol.

2. A system according to claim 1 , wherein the output port is configured to be coupled to the computer system via at least one interface selected from the group consisting of a USB interface and a Bluetooth interface.

3. A system according to claim 1 , wherein the sensor interface device further comprises an LED configured to indicate whether communication between the sensor interface device and the computer system is occurring wirelessly via Bluetooth.

4. A system according to claim 1 , wherein the sensor interface device further comprises an LCD display configured to display information regarding the functioning of the sensor interface device.

5. A system according to claim 1 , wherein the set of sensor inputs includes at least one member selected from the group consisting of a heart rate sensor, a breathing rate sensor, a skin conductance sensor, a skin temperature sensor, and combinations thereof.

6. A system according to claim 1 , wherein the processor is configured to select, as the stress-indicating physiological parameter, the physiological parameter for which the greatest variation of values exists within the measurement stream.

7. A system according to claim 1 , wherein the processor is configured to determine the pre-defined range of the baseline value of the stress-indicating physiological parameter based on the greatest variation of its values.

8. A system according to claim 1 , wherein the computer program code provides the set of training segments selected from the group consisting of those segments that do not present the stress-inducing prompt and those segments that do present the stress-inducing prompt.

9. A system according to claim 1 , wherein the computer program code provides feedback indicative of a degree to which the subject has achieved the baseline value of the stress-indicating physiological parameter.

10. A system according to claim 1 , wherein the relaxation-inducing protocol is passive muscle relaxation, and the passive muscle relaxation is structured in a manner tending to cause achievement of a state in which the subject maintains alertness with a relative minimum of stress.

11. A system according to claim 1 , wherein the relaxation-inducing protocol is autogenics, and the autogenics is structured in a manner tending to cause achievement of a state in which the subject maintains alertness with a relative minimum of stress.

12. A system according to claim 1 , wherein the relaxation-inducing protocol is guided imagery and the guided imagery is structured in a manner tending to cause achievement of a state in which the subject maintains alertness with a relative minimum of stress.

13. A system according to claim 1 , wherein the relaxation-inducing protocol is mindfulness, and the mindfulness is structured in a manner tending to cause achievement of a state in which the subject maintains alertness with a relative minimum of stress.

14. A system according to claim 1 , wherein the relaxation-inducing protocol is controlled breathing, and the controlled breathing is structured in a manner tending to cause achievement of a state in which the subject maintains alertness with a relative minimum of stress.

15. A system according to claim 1 , wherein the computer program code provides the set of training segments as a sequence of training segments that do not present the stress-inducing prompt, and the sequence comprises, in any order:

a training segment in which the subject is prompted to perform the relaxation-inducing protocol;

a training segment in which the subject is prompted to perform the relaxation-inducing protocol while receiving feedback indicative of the stress-indicating physiological parameter; and

a training segment in which the subject receives feedback indicative of the stress-indicating physiological parameter without being prompted to perform the relaxation-inducing protocol.

16. A system according to claim 1 , wherein the computer program code provides the set of training segments as a sequence of training segments that do present the stress-inducing prompt, and the sequence comprises, in any order:

a training segment in which the subject is simultaneously presented with the stress-inducing prompt and induced to perform the relaxation-inducing protocol, while receiving feedback indicative of the stress-indicating physiological parameter;

a training segment in which the subject is presented with the stress-inducing prompt, but not induced to perform the relaxation-inducing protocol, while receiving feedback indicative of the stress-indicating physiological parameter; and

a training segment in which the subject is presented with the stress-inducing prompt, but not induced to perform the relaxation-inducing protocol, while not receiving feedback indicative of the stress-indicating physiological parameter.

17. A system according to claim 1 , wherein the processor is configured to:

determine the relaxation-inducing protocol in the profiling segment;

present, to the subject, a set of relaxation exercises;

for each relaxation exercise, record a first set of biological measurements, while the subject performs the relaxation exercise; and

record a second set of biological measurements during a recovery period following performance of the relaxation exercise.