Grossly inaccurate breathing rate

[Joot]

Since I got it, the Inspire 2 has reported my breathing rate typically around 16 to 18 breaths per minute. During sleep, right? That’s a breath every 3.5 second or so — completely ridiculous. That would be panting! I just counted my own breaths at rest, and it’s more like 7 breaths per min. And would surely be slower during sleep. Is there any way to improve the accuracy of the device, or is this metric just garbage? 

I’ve been fretting over my HRV (usually around 15 to 20, which according to the literature, is approximately in range for imminent cardiovascular death) but the obvious inaccuracy of the breathing metric now has me wondering if the HRV is also garbage and not something that I should be concerned about at all. 

[DrSteveBrule]

I don't know if I agree about the breathing rate, panting is like 2-3 breaths per second for me. 16 to 18 breaths per minute seems reasonable to me for sleeping. However, I have no idea how the Inspire 2 measures breathing rate since it only seems to have heart rate and motion sensors so it probably is quite inaccurate. (Edit: I looked it up, according to medical researchers, 12 - 20 breaths per minute while sleeping is typical in healthy adults, see third paragraph in introduction section - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5823419/ )

The HRV should be at least somewhat accurate since it has a heart rate sensor. My HRV is usually around 120 ms. Does your heart rate data seem reasonable while sitting or exercising? If you have premium, you can see your sleeping heart rate under Restoration in the detail view of a specific day in the Sleep tile of the phone app. This is what mine looks like for last night, it reported 127 ms for the HRV for this data (Inspire 2 only does HRV for sleeping heart rate).