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Reference Intervals and Prediction Equation for Sustained Maximal Inspiratory Pressure in Healthy Adults

Takuya Ujikawa1,2, Hiroki Sato1,2, Sho Takahashi2

  • 1Department of Physical Therapy, Kawasaki University of Medical Welfare, Kurashiki, JPN.

Cureus
|August 15, 2026
PubMed
Summary

This study established sex- and age-specific reference intervals for sustained maximal inspiratory pressure (SMIP) in healthy adults. A new prediction equation was developed to aid clinical interpretation of inspiratory muscle performance.

Keywords:
healthy adultsinspiratory muscle performanceprediction equationreference intervalsustained maximal inspiratory pressure

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