Dysfunction in the respiratory muscles can lead to
hyperventilation, reduction in exercise tolerance, and
even respiratory insufficiency; also, it is associated with
an increase in morbidity and mortality rates.4,5 The evaluation
of respiratory muscle strength is of great clinical
importance and can be measured by static and dynamic
maneuvers.6–9 Static maneuvers infer maximal inspiratory
pressure (MIP) and maximal expiratory pressure (MEP).
These parameters, evaluated through the mouth, reflect
the pressure that is being generated by the action of the
respiratory muscles.