But VitalStim is meant to increase muscle strength. If you have weak musculature it's not likely related to stuttering. Do you know how the SLP tested your tongue strength? Edit: ... and side note ... when I was in grad school I was a subject in a long-term study testing if vitalstim increased muscle strength. Specifically the suprahyoid muscles (just under the tongue but above the larynx). The broad conclusions is that 6 weeks of vitalstim 2x weekly didn't improve muscle strength in a group of healthy individuals. This is just one study, but you need to ask your SLP for her rationale of evidence-based practice (ideally, complete with citations).