Basically, in our Garmin Connect profiles we can only set the units globally as a group. There are 3 choices, Metric, Statute and Statute UK. Whereas on the activity tracker (in my case fenix 5 plus) we can set the units categorically. For instance, I can use metric units for everything except weight, which I set to lbs. The issue with not having this fine grained control on the Garmin Connect side is that it greatly limits your ability to track progression with certain activity profiles.
SCENARIO 1:
I do weight training 6 times/week. With me being in Canada and using the metric system, Garmin Connect is configured with the only viable metric option. However, there is a major downside to this as all my sets and weights for each exercise are converted to kg on Connect, despite having the watch ask for lbs. Now when you go to the gym here in North America the machines have weight plates that go up in 5 lb increments, NOT in kg. Which means that in order to track progress using Connect itself I would have to convert the kg value to lbs manually each time which is tedious.
SCENARIO 2:
This is an extension of problem number 1, the workout creator on Connect only allows using metric units for strength workouts when it is configured as such. So now I cannot input the correct weight for the session without going through tedious and time consuming conversion processes. The kg value is useless on an American made machine and I would not know how much weight to put on if for example I have 18.15 kg used last session. So I have to log with pen and paper.
Thank you for reading this, please vote for this issue (I'm surprised that Garmin didn't think of these use cases as a great feature is really limited due to these omissions).