#13 The mWR showing in Garmin Connect is different to mWR on Athletica
The main reason may be that the website has subsequently calculated a newer WR profile than the one downloaded and used by the data field. Another reason is that the data field has to make decisions in real time during its calculations. Because of limited memory and resources it also can’t change its mind when the next bit of power or pacing data becomes available to it. The website calculates mWR with visibility of the full activity data plus has many weeks history of your activities. It may be possible it makes a slightly different decision in its calculations.
During testing we saw very close alignment within a percentage point or so. Be aware the data field also shows the mWR to one decimal place (more on website) on Connect whilst Athletica rounds to an integer value.