Cardiac benefits of deep breathing
https://blossom.primal.net/35d3b7c48157765424142bfb0678e87455ff6723330226c55ad1d2319935a3a9.mov
One of the studies I looked at
https://www.sciencedirect.com/science/article/abs/pii/S1744388121000141?via%3Dihub
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