A system for breath training, the system comprising: an output device; at least one sensor, configured to detect physiological data from a trainee during a breath training regimen; wherein the at least one sensor includes a blood oxygen saturation sensor configured to detect a blood oxygen saturation level from the trainee during a breath training regimen; and a data processor coupled to the output device and the at least one sensor, the data processor configured to: provide instructions as part of the breath training regimen to the trainee through the output device, the instructions including instructing the trainee to hold his breath, receive the physiological data detected from the at least one sensor and the at least one blood oxygen saturation sensor during the breath training regimen, determine that the trainee has resumed breathing from the blood oxygen saturation level, analyze the physiological data that was detected during the breath training regimen to determine a compliance of the trainee with the breath training regimen based on the physiological data, wherein the compliance of the trainee is determined by at least the data that the trainee has resumed breathing, and provide an updated breath training regimen that is based on the determined compliance of the trainee with breath training regimen based on the analysis of the physiological data detected during the breath training regimen after the trainee completes the breath training regimen. an output device; at least one sensor, configured to detect physiological data from a trainee during a breath training regimen; wherein the at least one sensor includes a blood oxygen saturation sensor configured to detect a blood oxygen saturation level from the trainee during a breath training regimen; and a data processor coupled to the output device and the at least one sensor, the data processor configured to: provide instructions as part of the breath training regimen to the trainee through the output device, the instructions including instructing the trainee to hold his breath, receive the physiological data detected from the at least one sensor and the at least one blood oxygen saturation sensor during the breath training regimen, determine that the trainee has resumed breathing from the blood oxygen saturation level, analyze the physiological data that was detected during the breath training regimen to determine a compliance of the trainee with the breath training regimen based on the physiological data, wherein the compliance of the trainee is determined by at least the data that the trainee has resumed breathing, and provide an updated breath training regimen that is based on the determined compliance of the trainee with breath training regimen based on the analysis of the physiological data detected during the breath training regimen after the trainee completes the breath training regimen. provide instructions as part of the breath training regimen to the trainee through the output device, the instructions including instructing the trainee to hold his breath, receive the physiological data detected from the at least one sensor and the at least one blood oxygen saturation sensor during the breath training regimen, determine that the trainee has resumed breathing from the blood oxygen saturation level, analyze the physiological data that was detected during the breath training regimen to determine a compliance of the trainee with the breath training regimen based on the physiological data, wherein the compliance of the trainee is determined by at least the data that the trainee has resumed breathing, and provide an updated breath training regimen that is based on the determined compliance of the trainee with breath training regimen based on the analysis of the physiological data detected during the breath training regimen after the trainee completes the breath training regimen.