Breathing exercises to synchronize heart and respiratory rates have been promoted to improve physical and mental health, but there is no scientific consensus.
Cardiac coherence relies on breathing exercises to synchronize heart and respiratory rates, with the aim of improving physical and mental health. Does scientific evidence support this practice?Respiratory and cardiac functions are interconnected. Heart rate increases during inhalation and decreases during exhalation. This phenomenon is called respiratory sinus arrhythmia or heart rate variability.
This area of research has been extensively explored; nearly 2000 clinical trials on heart rate variability are registered on clinicaltrials.gov.on voluntary slow breathing found increased heart rate variability, especially with repeated sessions. It concluded that slow-breathing exercises could be an inexpensive, low-tech complementary intervention.
The meta-analysis concluded that claiming to cure numerous ailments with breathing exercises alone, without acknowledging the current limited state of knowledge and failing to offer other therapeutic options, could lead to potential misuse.
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