TIRE testing and IMT provide a template from which a variety of outcomes and training regimens are possible. Several key relevant outcomes include the MIP, SMIP, accumulated SMIP, slope of the SMIP, and TTmus. TIRE IMT provides a training stimulus throughout the full range of inspiration with the capacity to alter the form of training (endurance, strength, power, and combinations of each) at various points in the SMIP to elicit wanted effects for specific tasks or sports. Future research is warranted to further examine novel forms of TIRE IMT as well as the clinical utility of TIRE testing outcomes in various healthy and diseased populations in whom improved breathing could result in improved symptoms and functional/exercise performance. Furthermore, the methods and outcomes of TIRE testing and training should be examined and applied to the expiratory muscles.