Abstract: A computer-implemented system for training a subject to improve psychophysiological function for performance of stress-inducing activity includes a sensor interface device and a non-transitory, tangible computer readable storage medium storing computer program code. The sensor interface provides measurement of a physiological parameter of the subject, indicating stress in the subject. The computer readable storage medium stores computer code that provides a set of training segments presenting the subject with one or more visual, audible, or tactile prompts 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.