Breath training apparatus

A breath training apparatus, comprising:

• a breathing unit defining an air inlet, an air outlet, and an enrichment airflow pathway therebetween, wherein the breathing unit is adapted to:
• receive exhaled air from a user in at least one exhalation pass through the air inlet;
• enable a portion of air in the enrichment airflow pathway to vent through the air outlet, such that the remaining air in the enrichment airflow pathway mixes with the exhaled air to be enriched in CO2 concentration, and release at least a portion of the enriched air through the air inlet for inhalation in subsequent inhalation pass to the user;
• at least one CO2 modulation unit coupled to the breathing unit for modulating the CO2 concentration in the enriched air, such that a controlled manipulation of the at least one CO2 modulation unit corresponds to a control of the CO2 concentration within the enrichment airflow pathway of the breathing unit;
• and
• a control unit, comprising:
• at least one CO2 actuator for controllably manipulating the at least one CO2 modulation unit to control the CO2 concentration within the enrichment airflow pathway of the breathing unit;
• and
• a CO2 sensor for generating signals corresponding to the CO2 concentration of the enriched air within the enrichment airflow pathway of the breathing unit;
• and
• a controller for receiving the signals corresponding to the CO2 concentration within the enrichment airflow pathway from the CO2 sensor, comparing the CO2 concentration with a defined CO2 concentration, and correspondingly controlling the at least one CO2 actuator for the controlled manipulation of the at least one CO2 modulation unit, such that the controlled manipulation of the at least one CO2 modulation unit adjusts the CO2 concentration within the enrichment airflow pathway at least substantially equivalent to the defined CO2 concentration.