In practice, I often lose the heart rate measurement as soon as I apartment cycling or mountain biking, I could still understand for mountain biking due to vibration, but on the ergometer, my arm did not really move. A little sweat and measurement no longer works. So I often find myself at the end of "exercise with a chart that has not completely given the effort. For a supposed instrument measuring the activity, it's stupid. I also sometimes feel that it does not measure the time, by tapping on the screen I have a value that seems a little shifted and realigned it, sometimes with fifteen to twenty BPM difference, so I wonder what it measures when I do not pat.
It seems that the extent of rhythm is influenced by skin color (problem with tattoos including but Apple Watch has the same concern), humidity, short it is quite tricky as a measure. And do an hour bike then realize he was conspicuously absent all this time, it's frustrating.
In terms of story, the bracelet reflects the altitude to count the floors (climb three meters = one floor), but it does also in the car, suddenly I find myself this morning, for example, with twelve floors while that I have actually mounted one.
The bracelet is not waterproof, if you like swimming, well ... no, that's wrong. Find another activity ...
The strap closure system is fine, no risk of losing the machine by accident (except tear).
The alarm by vibration is very practical (as the caller via the iPhone display), against say it is discreet, not too much, actually. With my hand under the pillow and thus the bracelet against the spring mattress, it's the bed that vibrates :-)
In conclusion, I am not sure to buy this product if I should fail. I orienterais me to a Polar product with a more reliable measure heart, even if the shoulder belt is not what I prefer in terms of comfort. Moreover Polar sensors are compatible with sporting equipment, such S-Line at Kettler.
