I do believe breathing is an issue we all have and we need to control it. I know that's something in my case at least but I also do believe it's very psychological. There are times when I stutter and its due to doubt. I'm always overthinking and stressing over it even though it's illogical to do so and I try and reason with myself. When stressed, breathing does help with it and improper breathing can help induce stress and panic. I'll definitely check this out as I do believe there is an issue with my breathing and it should most definitely help. Thank you !