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. Author manuscript; available in PMC: 2020 Jun 19.
Published in final edited form as: Expert Rev Cardiovasc Ther. 2013 Feb;11(2):161–177. doi: 10.1586/erc.12.191

Figure 11. Graphic comparison of test of incremental respiratory endurance inspiratory muscle training to Threshold inspiratory muscle training in the same person.

Figure 11.

The first test shows an example of TIRE IMT with a maximal inspiratory pressure of −139 cmH2O (shown on the y-axis) that continued for 12.1 s (shown on the x-axis). The last test shows an xample of Threshold IMT with the highest maximal inspiratory pressure possible using the Threshold device (−41 cmH2O which is shown on the y-axis with a slight and very short increase in pressure to −48 cmH2O shortly after inspiration) that continued for approximately 5 s before inspiration could no longer be maintained.

IMT: Inspiratory muscle training; TIRE: Test of incremental respiratory endurance.