Heart rate setting does not work. I set it in the settings so that the heart rate zones are calculated from HRmax, but after the race I see that the zones are not clear from what they are set. my hrmax is 191. it turns out that the 5th zone is defined as a maximum for hours > 171. this is not true. this is not 90-100% of hrmax 191. who else has this? also not true in beats / min.