wrong Personal Record time

Personal Records

Personal records provide a convenient way to track your fitness milestones. Garmin Connect measures your records for steps, running, cycling and a few other activity types. You can choose if you want to share your personal records with others in your privacy settings.

Receiving a Record

Each time that you upload data from your Garmin device or create an activity that surpasses one of your previous personal records, that achievement will be noted here. Strength activities can be edited in Garmin Connect to add weight records, but other activity types cannot be edited to make them personal records.

For personal records that track your best time for a specific distance, the activity does not need to match the distance exactly. However, it cannot be shorter than the specified distance, and it must be close in total distance. For example, a run of 13 miles cannot be counted for your half marathon personal record, but a run of 13.3 miles can.

The PB 10k time shown in the record list is based on 10,4k instead of 10k alone

The way it works (if working correctly) is that any 10k distance that is your fastest within your run could count toward your PR. Somewhere between zero and 10.4 it detects your fastest 10k. It could be the first 10k, 0.4 to 10.4 or any 10k anywhere in between. If somewhere in the middle you sprint your fastest 100m it will record that as your new 100m PR. If your new PR equals the total time to complete 10.4 then it is not working correctly.

Read this discussion:

https://forums.garmin.com/sports-fitness/running-multisport/f/forerunner-645-645-m/242325/5k-personal-records-being-recorded-incorreclty

I'm sorry to reject the answer... the only answer should come from Garmin when solving this issue.

I'm expecting this to be just working automatically.

Altough reading that discussion it's interesting to realize how old is the issue

7419217 said:

the only answer should come from Garmin when solving this issue.

There is no issue to be solved. It works like this on purpose.

I suppose you're considering a wrong purpose.

The purpose is crystal clear: tell me how long took me to do a 10k run, not a 10,4k run.

There's no manual trim to be done.

Indeed I had a 5k PB recorded while doing a 10k activity, so it's just not working.

Unfortunately you aren't being crystal clear. If for example you ran 10k in 60min, and within that run, if you ran one continuous 5k in 28min (i.e., it was your fastest pace over any 5k period in the run), what you are saying is that it would indicate your new 5k PB as 60min instead of 28min. That would be wrong as I doubt your previous 5k was longer than 60min. But if it said your new 5k PB is 28min, that would be correct. The watch doesn't care if you ran a total of 5k or an ultra-marathon, it just recognized that a 5k interval within any period is faster than any other 5k you have ever run. If you don't like the community response to your question on a community forum, then contact Garmin directly.

No you did not understand... 
I'm saying that the PB recording is not strictly activity based, *indeed* it's recording a 5K PB inside a 10,4K activity.

For the same reason it should record 10k PB in a 10,4K activity *instead* for some reason it's saying that my 10K PB is the 10,4K time which is crystal clear wrong.

Meaning that the feature it's just not working very well.

This is not about the community response, because this is something the community can't solve.

It might be similar, related to PR. Do you get the notification New Personal Record detected - Do you want to update...and when you update in GC mobile nothing is changed in your records, all older dates and times. It is not a big issue, but annoying.