Jan 8, 2017
Can a Samsung Gear S3 (Classic) replace a Polar H7 heart rate sensor during gym sessions? Probably not. At least from what I’ve seen so far.
I experimented with a one hour and five-minute workout on an elliptical trainer and found significant differences between the two devices. Polar's H7 tracked a (realistic) maximum heart rate of 165 beats per minute, while the Gear S3 claimed a peak of 215!
The graphs from both devices differ massively. I'm not sure what triggered the massive jump in the second half of the workout on the Gear S3.
I was wearing the watch uncomfortably tight, so the optical sensor had a fair chance, but, it still didn't do too well.
I need to do more experiments with different exercises...