Originally Posted by
Seattle Forrest
Garmin's newer watches record respiration rate during activity and in the background too. I don't know how accurate they are, I suspect they work better with a chest strap.
Really? How do they do that? What's the sensor and how does it transmit data? HR varies if one breathes deeply, which is very noticeable when taking an HRV reading, so perhaps that's what's being recorded. If that's the case, I suspect it would work well up to some HR/effort, then completely fail.