Very nice. I have no heart issues but have been experimenting with extended breathing/longer exhales to calm down my sympathetic nervous system. I believe intentional breathing is a big, mostly underutilized tool all of us have to be generally more relaxed and healthier and also to calm ourselves down in stressful situations
- https://news.ycombinator.com/item?id=37538028
- https://github.com/kieranabrennan/every-breath-you-take