Has anyone used Expand-A-Lung Sports Breathing Exerciser for anxiety?

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I was looking on Amazon. Translator had mentioned a Relaxator: https://www.consciousbreathing.com/product/relaxator/

 

She says it helps her shortness of breath.

 

I've had horrible anxiety that affects my blood pressure. The slightest anxiety pushes it way up. I saw the Expand-a-Lung and bought it. I haven't received it yet but thought it might help because I know I don't breathe correctly when I'm anxious.

 

If anyone has used either one of these devices, I'd be interested in what you have to say about it. I was noticing that some people had written that the Expand-a-Lung helps bp, so I want to see if it does for me. Who knows, I might buy both!