Described are the consequences of weakened respiratory muscles, such as abnormal values of pulmonary function tests, changed respiratory frequency, noneffective cough, breathing with accessory respiratory muscles, paradoxical breathing, impaired function of the diaphragm, glossopharyngeal breathing, alveolar hypoventilation during sleep and chronic alveolar hypoventilation with dispnoea and cyanosis.
Opisane so posledice oslabelosti dihalnih mišic, kot so nenormalne vrednosti pljučnih funkcijskih testov, spremenjena frekvenca dihanja, neučinkovit kašelj, dihanje s pomožnimi dihalnimi mišicami, paradoksno dihanje, zmajnšano delovanje trebušne prepone, glasofaringealno dihanje, alveolarna hipoventilacija med spanjem in kronična alveolarna hipoventilacija z dispnejo in cianozo.