Blog post by Marco Altini Below is an update of our research on the relationship between deep breathing and heart rate variability (HRV). It's been one year since HRV4Training launched HRV4Biofeedback, making it easier and more affordable to practice deep breathing at your resonant frequency Interestingly, we found that low HRV can be improved, at least acutely, with deep breathing (any dose might do) The previous image shows how people approaching this technique improve their session HRV. Below we also look at dose-response For some people, any dose will do, but a higher dose seems beneficial in general The follow-up analysis shows what drives these differences: In particular, it seems that only a high dose will provide benefits for people with already high HRV, while incremental benefits are shown for people with lower HRV Bottom line: according to this data, if your HRV is low, it can most likely improve (acutely) with any dose of deep breathing These changes won't necessarily also improve your baseline HRV, but they might impact positively self-regulation during stressful situations, as well as bring other benefits, which I have recently discussed in this podcast.
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