2 ms·
In my experience, FitBit Charge HR 2 was useless. Same issue with you where it would 40 bpm off or provide no reading at all. Apple Watch 3 was pretty bad too.
by appleiigs 8y ago
In my experience, FitBit Charge HR 2 was useless. Same issue with you where it would 40 bpm off or provide no reading at all.
Apple Watch 3 was pretty bad too. It would give inaccurate often enough that I couldn't use it for training in a heart rate zone. For example, I'd be walking for warm up and it would give a reading of 160 at the beginning, then back down to 110, then 10 mins later back to 160. I can't imagine the Apple Watch being a medical device with lives depending on it.
Garmin 935 has been great. It has the most accurate HR and GPS readings.
- zzzeek 8y agothis is the thing I wonder if the mechanism by which wrist-based HR monitors work (seems to be optical) is just not effective for some people, for some physiological reason.
- drited 8y agoAn electrical engineering friend who did some hardware development work on these a few years back suggested that noise in the observations was a fairly significant challenge. Seems the devices use a lot of data smoothing to counteract this.