Airway Muscle Training for Obstructive Sleep Apnea

Inspiratory and expiratory muscle strength training occur when subjects are required to breath in (as with inspiratory training) or out (as with expiratory training) through a pressure threshold device. This device features a spring-loaded one way valve which will only open if the subject is able to generate sufficient air pressure to overcome a predetermined pressure threshold. This threshold is typically set at 75% of the subject's maximum capacity. Repeatedly overcoming this threshold during training produces a strengthening effect in most people.

The placebo / sham intervention will mimic the active intervention(s) in every respect except the devices used will be rendered neutral via removal of the pressure threshold spring inside the devices.