Has anyone ever tried to, or succeeded in changing the tempo of the way they talk?

Has anyone ever tried to, or succeeded in changing the tempo of the way they talk? It might not be a well defined thing but everyone has a tempo of talking. Some naturally talk in a faster pace while some go at a slower pace. And usually to everyone, "talking slowly" is a very common, supposed antidote to moments of stuttering. So has anyone changed the tempo of their speech voluntarily and incorporated a slower pace of speaking and has it changed anything about the stutter?