About EMST150™ Expiratory Muscle Strength Trainer The EMST150™ is the most scientifically tested, clinically proven, innovative, handheld expiratory muscle strength trainer available! Designed by a well-respected team of researchers, the one of kind EMST150™ device now has over a decade worth of evidence-based outcomes. The EMST150™ research team and scientists worldwide know that the simple use of the EMST150™ over a short period of time results in an unquestionable improvement in breathing force while improving the strength of cough, swallow and voice. In trial after, the EMST150™ training system has shown significant improvements in the strength of healthy individuals, and individuals diagnosed with neurological/neurogenic diseases such as Parkinson’s disease, stroke, multiple sclerosis, ALS, and spinal cord injury. The latest studies also show promising results in other types of disease like Pompe’s and Huntington’s chorea.