Breath and Heart Rate
Breathing exercises can significantly impact heart health, as demonstrated by the correlation between breath patterns and heart rate fluctuations. By practicing techniques such as the 4-7-8 method or extended exhales, individuals can lower blood pressure and enhance their overall well-being. Increased heart rate variability, resulting from these practices, is linked to better health outcomes, including reduced depression and improved athletic performance.In this clip
From this podcast

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Encore - James Nestor - The Art and Science of Breath
Related Questions
Does a simple inhale and a longer exhale qualify as a breathwork practice? I remember it being discussed as useful to improve heart rate variability.
What does increasing heart rate variability do in relation to a slow exhale, as explained by Andrew Huberman in the episode "How to Breathe Correctly for Optimal Health, Mood, Learning & Performance | Huberman Lab Podcast" and the clip "Breathing and Heart Rate"?
What's the breathing method where you breathe in for a specific amount of seconds, hold, and exhale for a specific amount of seconds as discussed in the episode Encore - James Nestor - The Art and Science of Breath and the clip Breath and Heart Connection?