A device that reduces human energy loss in the breathing process, without requiring external energy such as electricity. The device transfers motion, elastic or heat energy by conveying air volume and pressure between the exhaling and inhaling phases in the breathing process in order to adjust the air pressure or temperature in these phases so as to improve air perfusion or the body's thermal homeostatic conditions as required, in addition to reducing the air resistance in masks or respirators used for protection against contaminants. The invention pertains to the field of healthcare. The invention comprises inhalation and exhalation chambers that are associated with air pumps, besides having elastic energy accumulation walls to minimize air flow resistance.