Pulmonary evaluation device has sensor means adapted to sense fluctuations in a user's lung operation and feedback means, driven by said sensor means, for determining successive values representative of the user's lung fluctuations and adapted to translate said values into appropriate lung-evaluating information. Optionally, the sensor means comprises or forms part of an item suitable to be worn by or carried adjacent the user so as to follow body movements caused by the user's lung operation to evaluate the user's lung operation.