1. 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 first breath training regimen, the first breath training regimen comprising a plurality of instructions, wherein detected physiological data includes blood oxygen saturation level; 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 first breath training regimen to the trainee through the output device, the instructions including instructing the trainee to hold their breath, receive the physiological data detected from the at least one sensor during the first breath training regimen, analyze the physiological data that was detected during the first breath training regimen to determine when the trainee has resumed normal breathing using the detected blood oxygen saturation level and to determine a compliance of the trainee with the first breath training regimen based on the physiological data detected after the instruction instructing the trainee to hold their breath and before the determination of when the trainee has resumed normal breathing, and provide feedback to the trainee after the trainee completes the first breath training regimen that is based on the analysis of the physiological data received during the first breath training regimen, the feedback including a second breath training regimen that is based on the determined compliance of the trainee with the first breath training regimen.