Providing resistive breathing exercise to the inspiratory muscles using the PFLEX device. Suggestion from the field.

This report describes a 6-step process for prescribing resistive inspiratory exercise using the PFLEX device, which is an inexpensive and effective method of enhancing the performance of the vital muscles of respiration. Until further clinical validation of minimal threshold guidelines for prescribing PEPs is achieved, the clinical judgment of the physical therapist remains the most important element in the prescription process.