The EMST 150 is the first calibrated expiratory muscle strength trainer designed specifically for individuals who want to enhance their breathing and swallow function. It was created by physiologists who recognized the importance of people with different needs to train muscles involved in their activities and also be able to measure their progress over time. Now those who use the EMST 150 are able to tailor their exercise regime and help achieve results with greater effectiveness and in less time. The EMST 150 is so lightweight and portable that it can fit in your briefcase, purse or gym bag. People of all ages from seniors to baby boomers to Gen X and from elite athletes to golfers and singers can take advantage of the EMST 150 trainer - - wherever you go!