Something I can count without a sensor is my breaths per minute (brpm) so I tried the health Snapshot and did a diaphragmatic breathing exercise of 10s in and out for 12 minutes. This should be 3 breaths per minute but the watch says 13 brpm.
It's an exercise I do occasionally because it just drops tension and anxiety after the first few breaths. I use an app that does a timer. I'm trying to say that I know it's 3 breaths per minute.
I don't know how the brpm measurement works. Maybe it's not looking at what you're doing in those 2 minutes or doing some heartbeat formula but it seems like a stretch to call it something measurable by a watch sensor.
