I bought a wahoo tickr x hrm to measure my heart rate more correctly when doing sprints. So yesterday I tried it out. I paired the hrm as an additional sensor to the watch and started a running activity ( I got a pop-up, that the watch discovered the tickr as an additional heart rate sensor then).
When I came to a hill, I decided to check my new hrm and did a sprint upwards, but to my surprise on the top, the vivoactive 3 did not show any heart rate! Only some seconds later it showed me a value. In order to identify the problem, I took a look at the raw data, where I saw something surprising:
The Raw Data from the hrm and the watch are different, even though they were paired!
More precisely: During the time with the highest speed, the .fit data from the watch still reports a heart rate of 130...this cannot be true. Afterwards, when I stopped running/ slowed down, the reported heart rate jumps up to 180. This is the known behaviour from the watch.
From the tickr chest strap I failed to obtain the cadence data, so I cannot identify the moment with higher speed. But as the data looks quite similar, i semms to have also failed to measure the heart rate during the sprint. This might suggest that both data tables report the data from the same device. However, specific data points have distinvt values. For example, the watch at some point reports a heart rate of 168, which the watch never does (it probably reports a value of 163).
So, these are my questions:
1. Did I pair the devices correctly?
2. Why are the inconsistencies between the data reported by the different devices, even though they were paired?
3. Why was the heart rate not measured correctly and what can I do to change this?